Nene is worried about Mr Muddle:

“Why does he live alone? Why doesn’t he have a mummy and daddy and Titas? If he holds the phone the wrong way, he needs a mummy and daddy and titas to tell him to hold it right.”

“But,” he specifies. “He’s only one person, so he doesn’t need two titas. One is enough.”

“What about a sister? Does he need a sister?”

“No, because if he has a smaller sister she can’t take care of him. But he needs and mummy and daddy and titas. To help him not to be muddled.”