Responses
Wow, a mangafox mention.
The series you mentioned sounds familiar.
I don’t think it’s this one, but it’s the first that popped to mind reading your description.
https://www.mangago.zone/read-manga/ienai_itami_o_daite_iru/
Or maybe this one:
https://www.mangago.zone/read-manga/sora_o_daite_oyasumi/
I haven't heard of mangafox in so long. Good ol days.
I remember reading a bl manga (pretty sure it was yaoi but not 100% sure) on Mangafox a loooong time ago (maybe 2010ish) about two step (I think) brothers. It was psychological with the older (I think) one being in love with the other one and having sex with people randomly to basically cope with the lust he felt for his brother. The scene that I remember the most was I think he was trying to sleep with their step father (or it might have just been some other older random dude) and his brother came home, walked in on them, and he was just like "Welcome home [brother's name]" and the chapter ended there.
I was so weirded out and sad reading this as a teenager and I want to fully appreciate it more as an adult, please and thank you lmao.