Denise turned towards the door as Judy McAden peeked inside. "I hope I'm not coming at a bad time. I called the hospital, and they said you both were up."
Denise sat up, trying to straighten her wrinkled hospital grown. "No, of course not. We're(Denise and her 4 year old kid) just watching T.V. C'mon in."
"Are you sure?"
"Please. I can only take so many hours of cartoons without a break."
I can't understand the last sentence - I can only take so many hours of cartoons without a break.
What is the meaning of this sentence?