From the story line i presume that it'll end badely for Gabi cause that kind of relationship never lasts. First we have to remember that Gabi is teacher and MC is just student, so that's strike 1. Strike 2, it seams that Gabi is married to Santi, at least i presume it's him and Santi is MCs bio dad. That's al ready cheating on it's own but most importantly Gabi is willingly having an affair with MC and MC is doing the same. He's not rejecting her aproach (presuming that player is on Gabi's route). Anyhow that kind of relationship is damaging especialy to Gabi's carrier as teacher. Think about it if anyone finds out, and lets not pretend that no one will find out about it cause always someone does find out, what school would hire a teacher that had relationship with her own student? To get things worse she could end up in jail and permanently stain her record. Remember what she said to MC about their affair : "No one can find out about this. No talk, no texting, no comunication in school about it".