My boyfriend uses me for sex while I'm busy with work, unaware of my stepmom's presence

I'm a busy girl, always working and studying, and my boyfriend is always ready to take advantage of that. He loves to sneak up on me when I'm distracted and start feeling up my pussy. I've caught him a few times doing it, but he just laughs and says he can't help himself. The other day, my mom was in the room too! I was so embarrassed, but he just kept going. He's always been a bit of a naughty boy, but this is taking it to a whole new level. He's not just fingering me, he's actually fucking me right there in front of my mom! I'm not sure what's gotten into him, but I'm not complaining. I love how he's always down for a good time, even if it means getting caught by my stepmom. He's always been my favorite fuck buddy, and now I'm more than ever grateful for his naughty ways.