Ugghhhh!

I'm annoyed, my son's birthday party is this weekend. My sister lives an hour away but she said she's coming, I was excited as I haven't seen my niece for a few months, but.... today she txtd me saying her and my niece have lice and if I could clean out their hair, as I have before. Omg! I don't want to, I don't even want them to come now. I sound like a bitch but I'm also 37wks pregnant and I don't wanna deal with it. Last time I cleaned their hair I freaked out. I kept thinking since I cleaned their hair I had got lice somehow, thankfully I didn't. But ughhhh...