Not just a woman, but with the same color of their skin too.
First chapter when chayton describe his partner,his mother said he marry a woman same color with them right?i know his mother is a racist white skin tone...when chayton bring keaton to his house his mother she prank keaton about his color...but eventually she accepted keaton coz his friend of his son...then this happened its mix emotion for a mother...skintone she don't like his son his pair is a man...it's painful for her...and don't forget his mother is a human unlike his father is a wolf easily to accept pair of his son^^
You can't blame his mother that's a normal reaction for a mother who think his son marrying a woman...that's hurt in her part too..unless she knows since chayton a gay or his partner is a man...even chayton his shock his pair is a man....