birthday ruined...

so i invited my guy friends (just two) to my birthday party, my mom knows about this, i asked her before hand and she said she was fine with them coming over and sleeping over. my friends just left my house from a sleepover last night (birthday party is tomorrow), and she called me into her room to tell me that she doesn’t feel comfortable with them sleeping over, 2 guys with 4 girls. nothings going to happen, none of us like each other, we’re only 14, i get that she could be worried that something would happen but nothing, is going to happen, we’re all really good friends, AND we have a separate tent for the guys. am i wrong for inviting them? how do i convince my mom to let them stay the night? also, he’s gay