In What Women Want, we are informed in the beginning of the movie that when Nick was a child, Nick's mother (who was a Vegas showgirl) and all of her showgirl friends absolutely adored him and how he had all of them wrapped around his finger.
When we see Nick at present day, there are two older women who are constantly fawning all over him and complimenting him every time we see them. Nick only refers to them as "girls" or "ladies"
They are listed in the credits as Eve and Margo. I don't recall Nick or anyone else ever refer to them by first name. I certainly don't recall Nick referring to any of them as "mother."
Are one of these women Nick's mother?