I won't blame the game, I was using cheat mod, and put very high points in love, corruption, chose all dialog options to alpha/confidence and non NTR/beta, and got it on with every girl possible, than after cafe with Emma, I get home give mom goodnight, and in bed receive that video.
I started game again, but only very high point in love, chose dialog option that only give more +love (boring), and that didn't happen, so it might be because of corruption points high (and dialog choice of corruption/slut), or just a bug because of cheat mod.