Mehhh-- that makes you sound needy, imho. I'd rather see you do a cheery (but get-the-point-across) "YOU'RE WELCOME!" the next time she eats and begins to leave the room without saying thank you.

M57 W 57; D30 D28 S24 S20 GD7 GD2 GD1 GD5m GD1m
BD 5/07; W's affair 5/07-8/07

At the end of every hard-earned day, people gotta find some reason to believe. (Bruce Springsteen)