my biggest concern is that these are both young females with no experience with joeys. so the thing your going to have to watch out for is baby stealing and bad parenting. Not only are the moms going to not know what to do very well, but there is only one dad for two mother which could have up to 4 joeys . So the mothers are going to have a hard time taking breaks because dad might not be able to help as much. Also dad will have no idea what to do most likely. Baby stealing can result in joeys dying. I would just recommend to do more research on baby stealing and realize at this point, there may be nothing you can do to help the 3 of them. You can't separate one female because she will have a hard time raising the joey alone. Best of luck, and would recommend watching them carefully and figuring out whats best moving forward.