This might just make the best example of what narcissistic/anti social behavior is like. If I'm not mistaken, classic narcissists or abusive behaviors (can't put my finger on the exact term) would make the other person isolated from everyone else and make them heavily depend on them. Like conditioning the other person to codependency, or something. So far, so good on portraying it!
Habibi became an instant grandma
One of the best parts. You get to spoil the kids and send them back with their parents to deal with the whining of how they should live with grandma all the time. You can get away with this by being the cool auntie but that's a bit harder to do as it is more subjective.