I've known for a while that I'm VERY attracted to pregnant women. I do watch them in porn, and once I even briefly dated a pregnant woman (long story). Most intense orgasms I've ever experienced. When my sister announced her pregnancy I thought it wouldn't be a very big deal. I was wrong.
Of course I would never tell her or act on it, but I've been obsessed with her pregnant body for months. I can't resist the urges to jerk off and fantasize about fucking her and sucking on her lactating breats while I cum inside her, but I feel terrible afterwards. I can't tell anyone about this, so at least I can write it here.