It obviously has consequences. And I hope the karma will hit a cheating Ian with delightful retribution. But it actually makes very little sense that someone that is actively trying to fuck every piece of pussy that looks in his general direction, and is actively encouraging a woman to cheat on her boyfriend, one of Ian's best friends; would suddenly stop wanting to fuck the likes of Allison, Cherry, Emma, and Lena. If it was a romantic route sure, but man whore Ian route, the guy shouldn't really care.