I get her or FIL don't drive, but we always drop them.
We have a 3 bed house.
The 2nd bedroom is my DS who is 7 and has a extendable Ikea bed, and the 3rd bedroom is a small box room where we have our clothes.
She would basically be sleeping in our bed and we'd have to sleep on a blow up mattress on DSs floor.
She has a 4 bedroom house BTW