Is it wrong that I'm going to tell my wife she can't sleep in the same bed as her mom?
Why do you need to tell her?
She is only allowed to sleep in her own bed. I hate her mother so much I can hardly tolerate her presence
It is wrong to tell other people what they can or cannot do. You should find something else to worry about because this is trivial and petty.
I'm the man, it's my job to make decisions for her. I will make her do what I want or else.
You need to be less controlling and need to let her be her own person.