Maybe a step too far.

My husband and I met when I was in college, I am a 5'3" brunette, Blue eyes, Small chested and average built but my husband says I have the best ass, Anyway before my husband I had only ever had monogamous relationships and one on one sex, Never been with a woman other than drunk kissing usually in front of guys while partying, My body count was 8 and I was pretty vanilla. I think we got drunk and had sex on our third or fourth date and my BFF who I had just met the year before and was my room mate walked in on me giving him head, She flung the door open and stopped looking straight at his dick, He has a big dick and honestly if I had my choice I would have had a little bit of a smaller one, I think it took about a month before he was really able to put it al the way in, He is 7.5" long but his girth...Wowzers, It still gets a little uncomfortable sometimes, The next day my room mate was like "So....You have to tell me...Could he even get that thing in you?, Was I just drunk or does he have a huge dick?", I told her we had a great night, I could only take about half of it and yes, She seen right".
Anyway we dated for 2 years and in that time we had a few experiences:
First my BFF and I got drunk one night and made out in front of him, My BFF is a bit taller than me, 5'6" or so, Curly dark hair and huge boobs, My husband has always thought she was attractive and what guy doesn't love huge boobs so we made out in front of him in just PJ's with no bras, after she left my room he told me he wanted to see us do more.
Next I let him fondle me in front of one of his friends, He had his hand up my shirt and I wasn't wearing a bra, I knew he was lifting my shirt enough that his friend could see my nips.
He became quite dominant as I became more submissive, We went on a road trip to see my mom and he made me ride the whole way, 6 hours, in the middle of the day topless and made sure lots of truckers and people in larger vehicles could look down and see me. I wasn't allowed to ever wear bras and I had small B cups that weren't super firm so they wiggled a lot as I walked but he loved when people would notice, He also made me stop wearing panties except during period week and in my 20's and 30's I wore a lot of "Summer dresses" and skirts which he kept pushing to be shorter and shorter and then he started wanting me to have "Accidental" flashes to people, Started out with strangers seeing me braless and sometimes in see through tops or dresses then progressed to me bending over too far or sitting in a manner that they could see up my dress or skirt, I had a lot of friends and he started pushing me to accidentally let my guy friends get a peek, then my female friends and then his friends, A few times he pushed me to expose myself to my uncles or cousins which I did, I am pretty sure 100's of men have seen my breasts or vagina since we have been together.
One time maybe 6 months before our wedding we were at his friends house staying the night because we had drank too much and he made me change with the door open and told me his friend was across the hall in his room watching and he could see the whole thing in the mirror. A month or so later he told me "You're getting tag teamed tonight by me and Mike", I was shocked and said "Fuck no", He bent me over and "Punished" me with his belt before going out and said "Don't sas me again" so I said "Yes sir" All night I was so nervous around him and his friend and then we went back to Mike's house and he made me get up in front of them and do a strip tease, He made me give Mike a lap dance and then he told me to suck Mikes dick, I did and then we went to the bedroom, I had sex with both of them and then he made me stay the night while he went home, Mike fucked me twice more before my husband texted me and said "Get home NOW" I did and he asked me what happened, I told him and he bent me over in front of the open kitchen blinds and spanked me with his belt.
After that he told me I had one month to convince my BFF to join us so I did, 2 weeks later we brought her home from the bar and had a 3 way, She stayed with us for 2 nights and 3 days before going home and the 3 of us hooked up something like 14 times, All day, All night, It was crazy. He keeps a tally and we have hooked up with her something like 200 times over our 21 year marriage, Even now in our early 40's we still do, We hooked up tons before she was married, 18 times during her 6 year marriage and lots after.
We brought home 9 of my friends over the years, Most of them multiple times except Amanda who was a nerdy brunette, Slightly chubby with big boobs and we brought her home, My husband fucked her while I sat in the chair and masturbated then he sat in the chair while I licked his cum out of her, We worked together and she always said it was too weird to ever come home with us again.
Darla 8 times, Jolene 3 times, Jenna 14 times, Marsha 4 times, Kristy twice, Jessie 6 times, Mel 5 times, and Pam 24 times, Pam is a beautiful blonde with a great body except her big saggy boobs but my husband loves fucking her and she likes to let him do anything he wants.
We were with his friends Mike 8 times, Dan 4 times, Brad 3 times, Jody 7 times, Jason 4 times, Rich 4 times, Clint 3 times, and Terry 3 times.
He convinced me twice to let multiple friends of his join us and 3 times we were with Terry and Dan, Twice with Mike and Jody and twice with Terry, Mike and Jody, His favorite thing is to have all of them, yes up to 4 men all at once cum on my face and I think it's because I have never like facials but he still makes me do it all the time and it makes me hate it more every time.
We progressed to attempting to involve strangers and it was easier than I thought, I never thought of myself as super hot but I don't think we ever got turned down, According to his tally 21 times with one other man, 4 times with 2 other men, 33 times with one other woman and twice with 2 other women, I think we had kind of just settled into the life that he was my dom and I was his sub and would do anything he wanted until....Last weekend.
So here's what happened last weekend, We were out with his family, Parents and his two brothers and his one brothers wife, Me and her are close but I have always had a hard line that his family was off limits, He had often mentioned his brothers and his brothers wife but I always said no, Last weekend he convinced me, We were staying in the guest house at his parents cabin and his brother was across the hall, He convinced me to let him have his way and while I was in the shower he poked his head in and said "Can ****** Brush his teeth while you're showering?", I said "ya, I don't care" trying not to let my voice tremble, He said "See, it's fine", I knew the shower curtain was somewhat see through so he brushed his teeth and left, I came out in just my towel and my husband called to me from the tiny livingroom, I walked in and him and his younger brother were sitting there, My husband said "******* doesn't believe me that you don't care if he sees you naked", I shrugged and said "Meh, I am sure you've seen your share of naked women, Why would I care?", My husband said "Take off your towel", His brother chuckled and I opened my towel, Short freckly legs, Bald pink full innie pussy, Flatish stomach, Tiny, Saggy, Empty boobs with dark pink nips that weirdly sag, yes my nips sag, I didn't even know that was a thing but after 4 kids that happens apparently, My husband said "Show him that ass", I turned and dropped my towel, His brother said "Daaamn, I knew your ass looked great in a bikini but....WOW".
My husband stood up and reached out his hand, I took it and he led me to where his brother was sitting, He told me to sit on his lap so I did, His brother said "You don't have one stretch mark?', I said "nope", I looked at my husband then took his brothers hand and put it on my thigh, His brother started touching me and soon cupped my saggy little boobs, I sat so I was facing away from him and he ran his hands over my back down to my hips, I spread my legs and let him reach around rubbing me, I kept my eyes locked on my husband then his brother stood me up and whipped his shorts down, I lowered myself onto him and he groaned "Oh fuck you're tight", I moaned and said "Kegeles do wonders", I rode him while my husband watched, His brother got me on on my knees doggy and my husband got on his knees in front of me, His brother cupped my tits and fucked me then almost at the same time as his brother came in me my husband came in my mouth, Afterward we all went to bed and then got up in the morning.
My sister in law pulled me aside while it was just me and her in the garage getting beach toys for the kids and informed me that we had left the blinds facing their room open last night and they saw everything, My heart sank and I instantly felt my face get flushed, My heart was racing and I tried to explain that it was a one time thing and she was super surprised I did it, While drinking that night me and her went to the garage and she asked if we were gonna do it again, I said "Oh god, I doubt it", She said "Darn" then blushed. I told my husband about it and he set the whole thing up, My sister in law Abby, Short, cute, Kinda busty brunette and I 69'ing on the living room floor in the guest house while all 3 of them watched and jerked and then me and her took turns with all of them and each other, It was a wild night, None of them know about the other stuff we have done and I told my husband it has to but now I fell super awkward around his family, I told him I don't want to do it again but his older brother has already been pushing for a swap so now I don't know what to do, Do I just keep doing it till it's comfortable or stop it now.