You can't blame your mum for thinking that

Caught red handed smh

You couldn't have just left the money somewhere else? You should never go into a woman's purse.

You should have just let your mom pay for lunch. Moms love to pay for their children every now and again when they get older. It makes them feel good!

Hopefully you explained the situation and she understood, otherwise that would suck

Good intentions. Bad results.

Hopefully she understood. Seems fairly obvious it was the other way around, as you had just insisted on paying for the meal... I hope she's not immune to logic

I'm the same way OP. Now that I'm older, I pay for things that my mom would have usually paid for. Kind of like a "thank you" for being a great mom. Hopefully once you explain she'll understand.

Good Intentions Bad Timing I'm sure if you explain she'd understand, OP

Apologize anyway and let her keep the money. You still get to help her out and she can save her pride