Grown stepdaughter

My wife any I have been separated for a year now.To my surprise the week after I left the house my stepdaughter came over to my new place .I have always been attracted to her.She is a blonde, 110 lbs, very small tits, and an ASS that is to die for.Being a young 30,and me a horny, dirty 60.
I've always wanted to have my way with her.one evening watching a movie, a sex scene came on and she stated that she wished someone would do that to her.With that said I immediately reached under her cover to find a swollen dripping honey hole
As I started to place my fingers in her she said, please use me
Punish me, treat me like a slut . I've been waiting on you to fuck me every sence I saw you fucking my mom and my grandma. I always watched and would cum when you made them suck your cock .
I grabbed her head and shoved her on my aching cock and thrust in her mouth till she chocked,I demanded she open back up and throat fucked her like the little slut she was. Pulling out I came all over her face and tits that I had always loved as I would watch her shower through the closet hole that I had drilled she laid back and said, can I call my boyfriend to join us ?
I said sure I would love to watch.
You can only watch if you get under me and as I get fucked lick my ass.i said I really don't know bout that and she asked if I had ever sucked a dick ?
I said no but was curious . you'll love it
And it makes me so fucking horney.
Well to say the boy showed up undressed and had a massive cock that ended up chocking me as I did her .
She fingered herself as I licked and sucked my first cock .Swallow daddy she yelled as he cum.
I did and she said let me wash you off and started to squirt as I covered her cunt with my mouth
Needless to say we have been doing this often now .i sometimes just watch her get fucked then ckean her up
She has turned me into a cuck .
Little BITCH knew all along I wanted her.and would do anything to have her.
My wife still don't know, should I tell her just for spite ?