what is that pronoun antecedent in this sentence. what changes should be made?

Parents go out of their way making sure they are happy and have what they want and need.

Parents go out of their way making sure they are happy and have what they want and need.

The underlined word is a pronoun but its antecedent isn't clear. It looks like they refers to "Parents," but that doesn't make much sense. What word do you think should be substituted for "they?"