Crass jokes and roleplay are both common reactions to things that scare us. Especially among teenagers and young adults. Those things are part of the way the human brain tries to cope.

And it's all still inappropriate. Roleplaying may be the only way your friend think she knows how to offer comfort via the internet, but you can tell her that the idea makes you feel sick, and that you much preferred the sympathy you got at first. People don't learn if they don't get told when they're screwing up.

I hope your family is all right, and stays that way.