Responses
Uhm, I think these fit?
https://www.mangago.zone/read-manga/my_daughter_s_girlfriend/ (MC has a daughter who has a girlfriend, the girlfriend falls in love with the MC though; age gap, cheating)
https://www.mangago.zone/read-manga/housewife_x_jk/ (MC has an affair with her daughter's friend/crush; age gap, cheating)
Just remembered this one too, but the MC and the dude are just friends, but she does fall in love with his mother:
https://www.mangago.zone/read-manga/jk_chan_and_her_male_classmate_s_mom/ (age gap)
I need a gl where the mc goes to her bfs home but gets fucked by his mom instead (I really love that bl trope so hope there's something like that for gl too!!)