I played a game, Sana, where this happens and I found it so hot. Does anyone else know of games where this happens?
N
Nymphomania Priestess has this same interaction with Yarizo once you get him as a follower
The upcoming
You must be registered to see the links
has a similar, premise, but the FMC is the one doing combats (you play as her) while the cuck is providing phone support from another dimension. If the boyfriend doesn't provide enough assist or if the enemies are too strong for her, FMC will be molested/blackmailed by the NTR guy that's exploring the place along her. Very hot and FMC is very cute. It has a demo.