I very much agree. Calmly tell him to leave, adding that you think he deserves a prettier, younger woman who would be more dedicated to him and who would be an orphan, so that there would be no mother's birthday dinners, childless, and independently wealthy, so that she could talk to him non-stop all day long.

A beautiful 35 year old woman with a job, one son, one dog, a good relationship with her mother and a decent relationship with her ex (son's dad) should have no trouble finding a new bf.