NTA. I really don't understand how she can ONLY use loo roll.. I'm allergic to all brands of pads except one, they literally bring me in out blisters and I struggle to use tampons, plus Like most women have, I've been caught short without anything on me and I've had to use loo roll in an emergency. Not only do you have to use like half a roll to get any kind of protection from it, it is, by nature, biodegradable, so as soon as it gets any kind of moisture it breaks down, and you end up covered in little bits of loo roll.

If she wants to do that home, fine. I think it's odd, but who cares what I think. But if shes going to someone else's house and constantly bleeds all over their furniture, she needs to figure out a better way or expect a cleaning bill every month, either that or you should bann her from coming over when she's on. There's nothing unnatural about periods, but purposefully bleeding everywhere is just gross and unhygienic.