Is there a texas family code that states you have to file for sole custody if there was a history of family violence?

My lawyer filed for sole custody on the petition because he said he had to due to the Texas Family Code. Is this true? He said because there was history of family violence that is what he had to do. That's actually not what I wanted and I'm thinking that he probably did it because he knew that my husband would file an answer and he would make more money.