My contract says no underwear until I approve it! I would ask for pull-ups asap! You need to take control of what is in your home not have mom tell you. He isn't trained if he is wetting himself that much and not telling you he needs to go. If you have carpet that is even more reason to not allow it. From the other parents perspective I would not want my child crawling or playing on carpet that has been peed on!!!! Yuck!!! Plus there will be the additional cost to get it professionally cleaned in the near future.