

Kids are probably old enough to get it. I would just think that you will be loading a shotgun that’s going to shoot you in the face down the line. Either the ladies will get in each other’s hair or, worse, they’ll team up against you. I think your girlfriend is either insane or not entirely honest when she says she would be fine with your arrangement. I would sooner suggest you look for a place closeby. I’m guessing the 15yo is eye rolling you hard and the 13yo will soon not care about you either. You’ve carried them through the divorce rough spot with your unique living arrangement. Take a bow and let it go. Provide a better environment for your new relationship.
That’s not universally true. Necrophiles may be past that, according to preference.