Yes they can and they mother. There son nothing wrong with it if you think of it as a woman sex man having sex.
A young man and motther woman can definitely have sex. Its pleasure and both of them. My mom is is happily married and my father takes care of her havve, there is no problem, he provides for her family.
They love each other. But he is always out, traveling because of the job he has, comes home have a month or so.