Oh, I feel your pain. Poor Lilly AND Poor you. I used to get this a lot from my own mother, however it was MY weight she kept referring to and not LOUD Lou's! It used to frustrate me beyond belief, then I gave her these lyrics from Mark Wills, "Don't Laugh At Me" ....
I'm fat, I'm thin, I'm short, I'm tall
I'm deaf, I'm blind, hey, aren't we all

Don't laugh at me
Don't call me names
Don't get your pleasure from my pain
In God's eyes we're all the same
Someday we'll all have perfect wings
Don't laugh at me

.... I have NEVER had my mother bring the issue up again.