((((((((Zoo))))))))

My bad. Sorry.

You totally deserve to be able to make a phone call without your son coming in. It is about setting boundaries and being consistent. When he bursts in excuse yourself from your conversation and remind him what you said. Then tell him to leave and you will get back to him when you are done. Over time he/they will remember to give you time when you ask for it. Sadly it doesn't come overnight. Just like the DBT skills you learned didn't come over night, their learning the rules in the house wont happen over night.