Is this her only grandchild? I would just be as clear as possible with her but @ the same time, be respectful (people tend to have to respect you if you keep ur cool) Plus it shows that you are the better person. Have ur man present, even invite them to dinner. Lay things on the line once & 4 all, if they except, wonderful, if they don't, remind them that they will ultimately loose. It's obvious that she cares(but is just a lil possessive). Life is short, this child is a gift from God to be shared by all of you.