Wings,
my 10 yr daughter likes to pull the "i wanna call Nana" card when she is in trouble or doesnt get her way. When she does crap like that, I pull the "im ur mother" card. she doesnt get to call her Nana out of haste like that. we both have to calm down and talk thru things. once that is done, she can call her Nana. but she cannot ask her to come get her or anything along those lines. its not 100% but then again, what is in parenting! i agree with pete, maybe u should talk to the future DIL and let her know whats going on and how u r going to handle it. 14 is a tough age. as for her commitments, let her know that she made the commitments and its her place to prioritize them. education should come first but let her learn that lesson. its gonna be hard for u but well worth it in the end. best of luck to u on this....i'll be here in 4 yrs asking how to keep from strangling mine :)