HELP! suggestions anyone?, friends! Options

[janerz14]

so one of my bestfriends is getting kicked out of her parents house, and im trying to convince my mother if she can move in with us. and i need help with suggestions of how to make the story believable and persuade her in a way to let her move in.

my mom keeps asking why? this and that. itz prolly because shes subborn and etc. but in the end she said she'll think about it.

so sometime next week im going to bring my bestfriend and my mom and talk about this. but we need a story.

help anyone? powers of persuasion?

[janerz14]

[ she's 20, im 19 ]

well im going to semi tell her the truth, make the whole conversation a positive thing, along the lines of that she's going to be my responsibility and its going to be benifical because she'll have a car and we work together, and im pretty much with her most of the entire time. and that we will abide by there rules, listen to everything my mother says. even ask her if we can go hang out. etc, all these things.
also saying that this is only a temporary situation, not actually moving in, but just a place to stay for 3months, help her get on her two feet, etc. and that she honestly has no place to go. [ really she doesnt ]

but shes going to end up asking why did she get ''thrown out/kicked out''.
i should prolly say that they ended up not getting along really well, and that its been like this for months.

because if i tell the actual, actual truth, im going to be in deep shit too. and im not letting that happen.

so what do you guys think??