I'm quite sure most players won't complain about "Eric" if there was a possible plot twist right at the start of the game, where you can not only choose a "good" or "war" path with Eric, but get rid of him before he gets Ann, as a third option. For sure, you have to do certain things to achieve that in game, delay the acquaintance somehow, make him look bad for mom and such things, but nothings there, so -> modcheat.
If someone wants to enjoy the challenge with Eric, enjoys to peep on sex scenes between mom and him, whatever, fine, he can go the good/bad path, if someone like me, don't want to see anything like "Eric" fine, I'ld go for this third option that sadly isn't there, so many players didn't play this game in the first place, because of that.
For me his actual implementation in a "porn" game is just bad game design, the author seems to have realised this and tried to fix this in the last version with the possibility of the "get rid of Eric" quests. For me, that's a step in the right direction, not quite enough tough, as i said, it should be a possibility from the start for the character of "mom/Ann".