Hello!
I have tried to find this story and any help is appreciated. The plot is a teens father uses her dirty panties to cu m in, and it escalates to him.doing while she wears them ending with sex.
Other details are the younger sister helps this happen and in so!e part is doing webcam stuff with an older guy who comes over and meets both girls.
Hope that's enough details to trigger someone's memory.
Lastly i thought it was titled something like good daughter or something but that as a search did not turn up the right one.
Thnks!