My father died about 9 years ago.
However, I actually mentioned to my mom one day if she had ever thought about dating again and she said, "when you get her age men are only looking for a woman to take care of them and she did not want to take care of a man". (she is in her 70's)
But, think what would you do? I personally think that people get lonely and want companionship. I think you should be happy for your mother.