Baby shower invites mystery

Britney • Wife, Mommy, Hairstylist. Pregnant with baby number 2❤️👶🏻
Soooooo I've ordered my babyshower invitations and my mother in law offers to help mail them just get addresses she says I ordered 50 not many need to be mailed only about 10-15 I end up giving her the list of addresses and against my better judgement give her all 50 mind you I have a full list of 50 people to invite as there are no extra invitations and the ones not being mailed are ones I'm hand giving I make this very clear I go over today and she says oh here's your extras and hands me 10 literally 10 invitations... I'm sorry what?! I don't find this out til I get home I'm immediately in panic where the hell are the rest, 10?! So now I'm a bit annoyed I now have to order 30 more to insure my guests I planned on inviting are getting invitations I'm alittle upset at this point, where did the rest of my invitations go to?!