Dreading the days we have SKs

4 months into living together and I absolutely dread the days we have SKs (7 and 9). We have them 50% of the week and they are well behaved kids, but I just want to isolate myself in the room and not have to interact with them. I think it’s the feeling of being a stranger in my own home half the week that gets me to just want to be alone. Has anyone else gone through this and how did you get through it?