You did not see me question the Dasan's route for instance.
Or any of the NTR routes where the MC
fails
In Penny's case, to achieve this you have to leave her at Lucius's mercy (similar to both situations with Frisha)
Or don't tell her about Henry's bs.
The MC is a loser, he puts his girls in harm's way
The orc scenario you mentioned fits the bill.
My problem in this particular situation is because of the simple fact that the MC is too tired to have sex with Tia.
That's it, that's the only information I got.
This is enough to make Tia want to cheat on him?
And to revert this I have to stop her giggling with Dasan?
In the non-ntr universe that
mrttao mentioned, the MC never fails. The girls do not have any interest in cheating on him
because he doesn't let them get violated by orcs, douchebags, while fucking demons, and the like. Not because he's too tired to have sex while in a relationship with them.