Overbearing loved ones

A good friend of mine just informed me (without asking) she bought a plane ticket to come spend the week before my due date with my husband and I. I am beyond upset. I have imagined this moment to be mine and my husbands. I don’t want someone in our home while I’m trying to get it ready for our son and I don’t want her in my space or having to entertain her while I am 39 weeks pregnant. I am not due for another month and a half but I am seriously stressing out about it. The tickets non refundable I already asked. I know she’s trying to be helpful but I don’t see how she thinks that. She obviously doesn’t have children or she would understand how in my personal bubble she is stepping in.