If you're in court for child support and the mother doesnt show up and you request full custody, can you take your child home that day?

My boyfriend has a child support hearing Tuesday and rumor is his baby momma won’t show up. And if she does, he gonna request that she be drug tested. She has over P.I. (public intox) she was up for 3 days on meth, her mom has the child. She doesn’t have a job, neither does her boyfriend, constantly stays drunk and high.