Gf blueballs you......Okay, you do it once In this situation you made a mistake. Lust took over you but anymore than that you deserve to come clean and break up cause now you are purposely not being faithful and only cares about the pleasure of sex.
Talk it out or just break up if you are not on board to the idea of your current relationship. Thus this might be my last analysis of this hentai manuha, gotta enjoy the get it on scenes now, Blocking off the depressing plot in the background for a time being.