What to do :/

Amber • Mommy to a beautiful baby girl 💜 married to the man of my dreams 💕 love my little family 👨‍👩‍👧
My husband and I have moved in to his dad's house to save cost and so that we can save up for a house. We don't have the money to move out yet which makes me depressed. Well upon being 16 weeks pregnant, his sister is 23 weeks pregnant. She doesn't live here but the only available room for a nursery would be "her room". Our room can barely fit our dressers and bed let alone throwing a baby crib into it but anyway. All of her stuff is here and I know for a fact she will be upset when I ask if she can get her stuff from her dad's, Defiantly don't wanna come off as mean or whatever but, what else can I do? We used to be close but she has gotten really moody with being pregnant and so have I.