In a very tricky situation at the moment, DD1 went out with her first boyfriend for just over two years before breaking up 4 years ago, he was clearly her first love, first everything really and they have remained very close since, as he has with our whole family. However DD1 has happened to come across information informing her that DD3 is now seeing her ex boyfriend (who is 5years older than DD3, who is 17).
I have literally no idea what to do.