Toilet paper and MIL

This is random but I think about this a lot, I don’t understand lol. Whenever my MIL visits for the weekend, we go through almost a whole roll of toilet paper each DAY she is here. It is 2 ply toilet paper too! How the heck is she using so much toilet paper?

Before she visited last time, I told my husband to pay attention to the toilet paper roll. Sure enough, a whole new roll was almost gone by the end of the day. He couldn’t believe it either lol. It’s a constant thing that happens every visit too!

I don’t think she is taking it home or anything lol she’s super generous with stuff. I just don’t understand how it’s possible to go through so much.

Does anyone else have anything similar happen?

Update - she’s in her late 40s! Thanks for the ideas, it makes more sense now… but still seems like a lot, but hey, I’m not the one going through it I guess! Also I always be sure to buy toilet paper before she visits, and have several rolls available in the bathroom when she’s here lol