Anyone interested in a taboo line (foster father or step-father/son, or teacher, fathers friend etc – just no incest) but a few years on. Like, maybe the kid got taken away or sent back into the system. Now, a few years later on, they run into each other through pure chance.
Angst, resurfacing feelings, complications follow. Oh the drama!
No non-con. They were both totally into it; maybe the younger one even instigated it more.