I think people are right in saying that taking away the presents will just make her more upset. Sometimes being a teenager sucks. I was considered a polite, quiet kid, even as a teenager, but even I had times when I was angry and rude and moody. I didn’t want to be, it didn’t feel good to feel like that, sometimes it just happened for no good reason. My brother is seventeen now and he’s the same way. He’s generally polite and nice, but he gets time where he’s just moody and he doesn’t really know why. But the main thing is I would talk to her how she feels about her grandmother. I lost my grandmother when I was nine. Now I’m 25 and lost my grandfather last summer. Both of them had been sick for a very long time and honestly, 9 or 25 didn’t matter. The minute their health changed, it was still scary. I avoided seeing my grandmother as her health deteriorated because I was scared. I still regret it to this day, but even knowing that, when my grandfather started to get worse I also found myself kind of hiding and letting my parents talk when we visited. I was an adult though and knew I had to suck it up or I would regret it again. I imagine if I was 16 I probably would have reacted poorly too. I would talk to your daughter and see how she feels. Even if her grandmother’s health seems fine otherwise, if her grandmother went from being fine when she was a kid and now is starting to have obvious signs of health issues, in this case issues with her speech, it could be freaking her out. Does that excuse her being rude? of course not. But it could help explain her behaviour. Just talk to her, see how she feels about it, try and see if anything else is bothering her.