Brother In Law

My sister married Liam two years ago. She's eight years older than me and has always been a bully.
Three months ago they stayed at our house as there's was being replastered throughout.
Liam took some days off work, but my sister who's a career woman, didn't.
He's always known I like and have sex with both sexes, so it wasn't a surprise to him when I offered to suck his cock.
I basically caught him wanking in the shower. Whether he meant to leave the bathroom door open or not, I don't know. What I do know, is my sisters husband has a big cock and he loves having it sucked.
That morning with only us two in the house, I gave my brother in law a blow job in the shower, before he fucked me stood up leaning against the wall.
I'd not had anal sex for some time, so his really thick cock hurt somewhat at first. But once he got over the fact he was fucking a guys arsehole, he really began to pound my fuckhole.
I relaxed and began to enjoy him thrusting into me. That's when he started to kiss my neck and right ear. It was all extremely sexual, but also incredibly naughty, it being my sisters husband.
When Liam came up my arse, I told him to do it. I wanted his seed inside of me. I wanted my sisters husband's essence filling my hole, and not hers.
We dried off a little but were still wet when we went into the guest bedroom, my old room, to have more sex.
It was then we got into a sixty nine and my brother in law tasted and felt cock in his mouth for the first time.
Putting me on my back, he lifted my legs and slid his gorgeous cock back into my arse. We fucked and kissed in the missionary position for such a wonderfully long time. And when he came inside me again, he said in my ear "I want to carry on having sex with you from now on".
Two years on from our first fuck, my brother in law and I now have sex in their home.
He works from home now after the pandemic and my sister has become a manager at work. It suits her personality perfectly, as she still likes to bully people.
She'd freak out if she ever found out her husband is fucking me two or three times a week. It would challenge all her preconceptions of control, that she thinks she has.
The amazing thing is, that's precisely what might happen soon. Liam has more and more frequently asked me to move away with him. He tells me he's in love with me and wants us to be together as a couple.
I was doubtful at first, but now know he's serious. And what's more, is I'm in love with him too.
We both know it would hurt my sister, but then she'd just bully someone else to get over it. That and spend more time on her career.