My cousin calls me to fix her faucet and I end up fixing her ass

I’ve always had a somewhat unusual relationship with my cousin. We’ve had a great time together, and when we were younger, we would give each other the occasional kiss. Of course, there’s sexual attraction there, but since we’re cousins, we’ve always behaved properly.About a month ago, she called me to ask if I could fix her faucet because her husband was traveling and they were a bit tight on money, and she didn’t want to call a plumber. So, I went to her house to see if I could help, and I missed her wearing what she had on when she answered the door: a white miniskirt, a pink top without a bra that showed off her nipples, and high heels that matched her top. I didn’t think much of it because I thought she must have had plans.The thing is, while I was bent over fixing the faucet, I looked up and could see her vaginal lips perfectly outlined through her tiny panties.When I finished fixing the faucet and stood up to leave, she was staring at me with a furious expression, biting her lower lip and lounging on the counter. I had stared at her so long looking up her skirt that I nearly fell onto her to kiss her and grab her ass. Luck was on my side because she went along with it. What followed was the best lay I’ve ever had in my life. Licking my cousin’s nipples, seeing and sucking her delicious breasts. Enjoying her mouth on my dick, my ass rubbing against her little clit, and slowly parting her lips to see her pussy disappear inside. But undoubtedly, the highlight was when she asked me to fuck her in the ass, because her husband had never wanted to do it. I barely finished saying the words when half of my dick was already inside her ass. A few days later, she told me the truth, that her husband had cheated on her, and she wanted the video to send it to her husband, so he could suffer watching another bigger dick cover her face in cum. I told her I didn’t care that she had used me, and since then, we’ve been having sex everyday.