After our separation my 21 yr old wife offered me her.....

Anus.
I'd flown out from Mass, to attempt a reconciliation with my young wife.
We were making out in her apt. in SoCal, which she shared with 2 guys and a girl.
She was a little drunk - and admitted that she'd fucked both her roommates, and had spent the night with a couple of guys who hit on her where she worked as a waitress. Then there were the two older brothers who lived upstairs.
"How old?"
"Probably in their late 40's."
('fucking this sexy blonde 20 yr old!- who likes to give head and prides herself on swallowing! Damn - bet they enjoyed her!')
We'd been apart for 2 months. So, her pussy had been busy - but probably the norm for SoCal in the 70's.
She got all lovey and whispered in my ear - "I want to give you something special tonight as a gift for coming out here to get back with me!"
"Special?"
"Yeah...." she took my hand and put it between her legs and kept pushing until my fingers were hovering over where her little butt hole is...!
"I want you to go in me here...."
She licked my dick and got me very wet - she may have used some nearby lubricant - I was too drunk to notice or remember...
She lay me on my back, and got up squatting on her feet with her wet cunt over my dick. She reached back and moved my hard-on to the opening of her bottom......and began slowly sitting down on me. She made noises I'd never heard her make before as my dick slid inside this new place in her body! I'm not overly long - but I am w i d e ....maybe from all my thumb squeezing from a decade of masturbating! ...so she was having trouble.
"Good! I hope this hurts like hell, Jamie"...into her ear. She made a little girl hurt noise...
When her ass cleft made contact with my balls - I held her by her hips to keep her from moving - as I savored the feeling of her tight ass.... and t let her know I was actually enjoying hurting her.
She whimpered, keened softly and cussed a little. "Oh fuck me this hurts Tom!"
Now here is the kicker to this night with that girl - we are fucking on the fold-out couch in the living room. the lights are off - but light is coming in from the street out front. Across the room, standing in the dark I see that her two male roommates are standing silently listening and watching her get butt-fucked!
About the time I notice them, I take her ass and move it in circles to stir my dick around in her and start to unload 3 months of cum into my young wife's butt - she squeals and bites me on the shoulder .......and I hear one of them say, "sorry man..." as they ease back out of the room to their bedrooms.
Little blondy never did know they watched her getting a dick up her ass.
Over the remainder of our marriage - (12 yrs of more of her cheating before SHE dumped me) I never felt the desire to butt-fuck her again - her pussy was sooo nice and tight and sweet as most girl's mouths! - - but my goodness she loved me to lick her ass for nearly and hour! She returned the favor.