
Quoting
cdwjava
This could be pretty easy - GET RID OF THE BOYFRIEND! Boot him out! He's an adult, he can go hit the skids. Someone was coming to pick him up, but they didn't? Well, too bad! That's HIS problem!
THEN, daughter needs to go home. If she won't go willingly, mom can come with the police and drag her back (they'll do that until she is 17 ... TX has an odd loophole in its delinquency law). YOU are only enabling this situation, and you may very well find your underage niece with child very shortly. Heck, I am surprised that the young lovers haven't decided (erroneously) that the "best way" (in their convoluted way of thinking) to stay together is as "a family."
You are NOT this child's parent! You are enabling her poor behavior and decision making. If mom truly is not providing for the child, then call the authorities. They may be very interested to hear that mom has been allowing her to shack up and play house with an adult, and, if mom has truly abandoned her child, they may want to hear that, too. Bottom line is, as long as everyone gives these two kids what they want, they will continue to behave poorly, make poor choices, and continue to be irresponsible since they have only been rewarded at every step with what THEY want. BF wants to move in to do the horizontal mombo with his minor girlfriend every night? Check. They want to live by their own rules? Check. Runaway and get someone get them a house (a mobile one) where they can continue to shack up on someone else's dime? Check. This is enabling behavior at its best, and if these two kids are not already into drugs and alcohol, I suspect that one or both are not far behind.