I can't understand a joke with many meanings. ...

Complete the hidden part of the joke. The joke goes like this: A woman sends a message to a man asking him to accompany her to have an abortion. (I was going to send a text message to the father, but I sent it to the father's brother), so later the woman sent a text message to the man, saying that she sent it wrong. The man thought the father of the child was his brother, and then he left with the woman. After coming out of the hospital, the woman gave the man a comb, which means, thank you brother-in-law This joke deliberately hides some contents, arouses suspense, arouses people's thinking and enhances interest. This is a good joke.