I think people in general are attracted to people that look similar to themselves. This isn’t universal obviously it’s just a common correlation. And since you have your mom’s genetics a woman that looks similar to you will look similar to your mom.

There’s a funny consequence of this where, if you separate siblings at a young age, they will never develop the revulsion towards each other that most siblings develop, and will be more likely to dig on each other if they meet as adults.