Boyfriend's Father

Over the Christmas period I stayed at my boyfriend's fathers place, back in my boyfriend's old town. Sleeping with my boyfriend each night during the three night stay, or that's what my boyfriend thinks.
The fact is my boyfriend got himself blind drunk on the second and third night, and by then I'd tasted his fathers cock, sucking him off in the basement on the first night.
I basically offered Tom a blow job when I got up to get a drink. Tom was about to go into his basement just wearing a t shirt as he'd left the window open from earlier that night.
Seeing his cock I couldn't help myself and offered to suck him off. Whether it was the alcohol or him just being horny, he invited me down and I took my time to blow my boyfriends dad.
When he came, I even swallowed his cum as he held onto my head. Back in bed with his son and still extremely horny, I went down on him waking him up. He let me carry on sucking him until he came in my mouth.
I wanted to kiss him, feeling dirty, so he could taste his and his fathers cum, but he fell asleep.
The following night things escalated when my boyfriend crashed out on the sofa. His dad and I put him to bed, then I joined his father in his bed.
We sucked and fucked all night until I got into bed with my boyfriend about two am, carrying two loads of cum up my arsehole.
When he woke up with a huge hangover the next morning, I managed to get him to slide his morning glory up my slippery hole.
The last night I stayed, my boyfriend and I had been out with friends. He was falling over drunk when the taxi dropped us off in the middle of the night.
Carrying him inside I put him on the couch, that's when I got startled hearing his father say he was in his basement.
My boyfriend's dad is a musician and his basement is set up for his instruments.
It's a well fitted out space which also has a sofa bed. I told him his son was fast asleep on the settee in the lounge, so he smoothly got the sofa bed sorted.
He was extremely horny that night and we did things I'd never done before sexually.
Before I climbed the stairs to help get my boyfriend to bed, I'd sucked, been fucked and had been fisted for the first time in my life. I'd also received three loads of cum, two inside my arsehole and one all over my face and tongue.
I drove us back home the next day, but not before giving my boyfriend's father a sneaky blow job in his conservatory, as his son showered.
At my insistence we've been back twice in January, and both times I've had anal sex with my boyfriend's dad.
They were both quickies, but long enough to take Mr O's cum up my arsehole without his son finding out.
We're going again soon for Mr O's birthday. I'm extremely tempted to invite my boyfriend's father to fuck me in front of his son, as his birthday present from me. Hopefully my boyfriend agrees and joins in.