Friend invited herself on trip 😡

Shampree • Mom of 1 daughter and 1 son! Angel mommy of 1 💙
So i won a free trip to Vegas in a raffle at work a few weeks back and the trip isn't until December 7th. My husband and I shared the news with a friend of both of ours and just basically saying how we cant wait to go because neither of us has ever been and this chick has the audacity to just take it upon herself to invite herself on our trip. Now me, being the type of person that i am, i told my husband that he should tell her that she can't just invite herself. This is literally the 1st trip that we will take BY OURSELVES, WITHOUT our daughter and i just don't feel like having a tag along while we are trying to enjoy our trip away. It's more of a friend of his and i met her through him so i want him to tell her that she CANNOT go. Am i wrong for feeling this way? I love her as a person but don't want her to come