Two months ago, a woman friend of mine (20's) uncovered that her brother (18) has feelings for her. She confronted him about it, and he admitted to having some fantasies about her. I could only offer some advice because I'm out of my depth on this one. She doesn't want sex with him, but she is interested in trying to give him a handjob to kind of "help" him and maybe test out what it's like.
I know it's a niche question, but my question for you ladies is, have you ever had any sort of sexual experience with a sibling (mainly brother)? And what mental state did you have to be in to do it? What helped you work up to doing it? What was it like emotionally during and after?
If you are able to help, and you have a legit profile and experience, it would be great if I can connect you with her so you can talk to her directly. She's obviously not interested in publicizing who she is at this point.