Blackmailed By Ex

I had a reputation in school for being easy all the boys knew every lunchtime i would take a boy home to have sex,that's how i got with my ex for 3 months.shortly after i met my husband i was 16 and he was 22 it was perfect and got married when i turned 19.in the last 2 years my husband has changed he's became moody which my brother in law would have to step in and calm the situation down.my brother in law in a lovely guy who i get on with,my husband and i hardly had sex when before he couldn't keep his hands off me.spending my time alone i got invited out and that was the night it all changed.i bumped into my ex and later on that night he came over to talk and showed me a picture on his phone that looked like we was about to kiss.i asked him to delete the picture and my ex said he would on one condition i had to sleep with him or it would be sent to my husband.i was given a deadline to the end of the week to decide.as the deadline was getting closer i was panicking that's was when my brother in law came round and could see something wasn't right and i confessed what was going on, my brother in law is a quiet guy but don't take any crap and said leave it to him.day before the deadline i knew i had to make a decision sleep with my ex or let my husband see the picture but later that day i heard from my brother in law it's been shorted out and he came by and handed over my ex's phone.i don't no what went on but my ex doesn't look in my direction now.at that moment i hugged my brother in law something ive never done and maybe i was reading more in to it but i felt a spark like when i met my husband.that moment on i was inviting my brother in law around for lunch and sometimes be flirty or just wear something to get him to notice me,the more he didn't show any interest the less i wore,then the moment came i picked up his plate and looked down and saw he was aroused he did find me attractive.when he was leaving i asked him if i wasn't married to his brother would he want me and wasn't expecting him to say he's had feelings for me from the first day he saw me and i leaned in and kissed him and he backed away saying only if it was regular sex and i instantly agreed,we was kissing moving up to my bedroom and onto my bed.i was on top off him my top came off and my bra he pulled my skirt up round my waist then rolled me over to be on top,he asked one last time if i was sure i wanted it and as i was just saying i did he put his very large dick in me.i had that oh shit moment as it took my breath away,the sound of his balls slapping as he fucked me hard and fast.holy shit i missed it,the way he fucked me i knew it was something he's been wanting for a long time.that night i was at his house having sex again,it's been over a year and we haven't been caught it's still wild meeting up in hotels on a few occasions.my husband comes home and doesn't question why his brother is there.