My 18 year old sister has recently started dating the father of her baby.
While they weren't actually dating at the time, my sister became pregnant when she was 16. The father has paid child-support since this all happened, but other than a few visits here and there, that's been about the extent of his "participation".
About two to three weeks ago, they decided to actually give their relationship a try. They both say they've never really stopped having feelings for each other and that their relationship may be in the best interested of their child who is now one.
The other day, my sister told me that he is purchasing a house and that she will be moving in with him in the next two months. She doesn't plan on telling our mom, who has raised us Catholic our whole lives, until about a week before she leaves. This will break her heart.
It seems like everything as far as the move is basically set. Unless they have some kind of falling out before then, it's very likely that she will actually move out and start this new life she seems to have already chosen.
My sister knows the truth and she knows what the Church's teachings are. How can I convince her to stay? Can I convince her to stay? I fear for my sister's soul as well as my niece’s well being. Any advice would be greatly appreciated!