MIL not listening to me

I really do not know what to do. My MIL is staying with us and is just driving me crazy. She sees me putting the baby to sleep and she starts clapping and tickling her feet I'm like ????? She's tired. And she starts saying "no I'm not tired, I want to be awake! Yes I want to be awake!" It's sooo annoying! 
I went to use the washroom and she already has her picked up and walking all over the house. I'm like excuse me? She's tired?! If she doesn't sleep soon she is going to get over tired I know my baby :/ 
Omg I don't even know what to do anymore, I'm currently on the couch while she's holding the baby and keep it her awake. 
Just needed to rant!!