Would you be upset if your husband and MIL made a big decision without you

Me and my husband don't want kids. My MIL really wanted to be a grandmother so she and my FIL decided to foster children. Whenever me and my husband go down to his parents house we stay in my husband's childhood room. I like it because it's an en suite. We've stayed in that room every time we see them. Last month his mother asked him if he cared if she turned his room into a room boy foster children and their guest room would be one for girl foster children. If they don't have any kids or boys when we visit we can still stay in his room. He agreed without asking me and I didn't find out until we started planning to see his parents again that we would have to sleep in the living room. I asked him why he didn't bother to ask me and he said he didn't think he had to since it's his mom's house and his room. I said I'm his wife and he should run everything by me but he said he doesn't agree that he should have to run letting his mom use HIS room in her own home. I asked was he married to me or married to his mother. We fought and he doesn't even want to go now. I asked my mom what she thought and she just ssid he could have given me the heads up about us possibly having to sleep in the living room but it was a dicision between him and his mom. I think ALL decisions should be run by husband and wife