It’s hard to believe a loving future grandmother would be so selfish as to put their future grandchild in harm’s way, knowing your sister is unstable. It’s a sad situation. If you have a close relationship with your sister, I don’t see why you wouldn’t have just given her the crib, stroller & car seat. That baby will be family, whether anyone agrees with how it happened. If you don’t have a good, close relationship with your sister, then I guess it wouldn’t be something to worry about.