Smack! Wham! Bam! That is the sound of a 2x4 up side your head. The text was just a repetition of what you have said countless times before. Stop it!
Does he have a key to your house? If so, have him give it to you. That sends a much more firm message that it is not his house to come and go. Stand your ground and dont let him use your house again.
I dont know what to tell you about how to change dialog with your mother. You do know she is concerned? I totally understand how it rubs you the wrong way - been there done that. Generation gap. It will happen 20 years from now with Sydney and yourself.
