I don't really have a problem with this, and when I did, it was only once. Though, I can't blame the mother, she's sweet.
She only speaks Spanish, (So my friend/her daughter was translating.) we were on teh topic of eating lunch, and I was like, "Okay, I don't mind eating something simple... honest." she smiled, and went to ask her mother what I could eat. The first thing her mother offers (after being informed of my vegetarianism) is Turkey, her daughter laughs, and corrects her politely. It went on for awhile until her dad got tired of it, and gave us $5 to go to the store and buy bread for PB&J! Haha.
Just had to share, but there should always be something simple you can suggest, just in case :]]