Oh boy, does he take the cake....."you are getting a divorce", so he is out of the starting gate. There is a difference between getting and GOT, and he has been still at home with you, in YOUR marital home. If he is ok with adultery, and wants the pretence that he is a free agent.....let him live elsewhere, get her calls etc on his own phone and not track his dirt into your home.
Actually his new gf has aproblem with manners also, phoning on your home phone is the pits. Seems these pair deserve each other.
Stay firm and kep this TURD and his other dirt out of your face.
God bless