ok sometimes people can be real nuts,, and twist things and make mistakes. but maybe she really wants to change??.. i dont know,, go with your feeling,, i mean after all its her grandson so she wants his life to be good even if there is something between you and her. so i would keep the email,, and take the money and put it in js account , say thank you ,, and print the email and keep it. and if later on she wants o make something bad out of this,, than you have the email.
and really do what ann said becouse it will gurantee you,,.. hugs to you and your son