MTM shouldn't have had trouble portraying a cold mother...
I don't get the impression she was the warm mother that her best-known sitcom characters may suggest...
Not only did her son commit suicide, but when she was asked about having another child she said she would like a do-over essentially because SHE "didn't get enough out of it the first time." She was very young, she mused, and would like to have another chance...for herself.