It's a great relief to see I'm not the only one dealing with discovering their kids' masturbation and having it get uncomfortably stuck in their heads.
So here's my situation-we have a hot tub in our house, and lately our daughter Krissy (she's sixteen) has been asking to use it every now and then when she's sore. It's in a room off the bathroom off the master bedroom at one end of the house, so it's normally pretty much the most private place in the house. But one night last year I was going out for something and wanted to check if I needed shaving cream first, so I went up to the bathroom and heard through the door the tub jets on high and Krissy moaning, and it was immediately obvious she was masturbating on the jets. I just snuck out without her knowing.
Now the thing is it's not like I didn't know she masturbated before. Neither I or my wife are hung up about sex, and Melissa (my wife) had talks with her years ago.
But there are two things that make it awkward. The first is that one of the main reasons she asks to use the tub is for back pain, because in the years since then her tits have gotten huge, they're up to DD cups now-same as her mother, but on a smaller frame. (and still perky with youth) Unless she grows into them she'll probably need a reduction at some point.
(The other thing is period cramps, in case the 'she's a woman now' symbolism wasn't heavy enough I guess)
The other thing is that Melissa likes to get off on the jets too, and give me sexy shows with them, that's really why we have the tub. (Even I've gotten off with the jets before, but I don't have to with a wife like that around.) So especially given the mother-daughter resemblance, it's INCREDIBLY easy for me to picture Krissy doing the same thing, like to the point where it's sometimes hard NOT to, either in my fantasies, or when I'm actually watching Melissa do one of her shows. And I'm uncomfortable with how rock hard horny that gets me.
I haven't told Melissa about this. Now that I write this down I wonder if she didn't know/assume what Krissy was doing the whole time. Honestly, Melissa's kinky enough that she might be willing to do some roleplaying, but oh man do I not know how to bring that up. And I'm not sure I want that 'experience' on my mind when I'm around Krissy for real, you know? Gaaaah.