I agree. But I think that it invites a battle with her if you even have the TV on, or even available.
I'd say, if you have to have her back in your house, put the TV away. And anticipate:
"Where's the TV? I want to watch something."
"Sorry, Mom. I've put the TV away. We won't be using it this week [or however long she is visiting]."
"But I want to watch something!"
"Sorry, Mom. I've put the TV away. We won't be using it this week."
"You're being rude. I'm a guest in your house and you need to get the TV out for me."
"Sorry, Mom. We won't be using it this week."
"You're doing this because of me, aren't you?"
"I'd just prefer not to use it this week."
"But why did you put it away?"
"I'd just prefer not to use it this week."
"That's no reason. Why are you doing this?"
"I'd just prefer not to use it this week."
I think you understand the tactic here....