Guess who's my fiancee

A young man excitedly tells his mother he's fallen in love and is going to get married.

He says, "Just for fun, Ma, I'm going to bring over 2 other female
friends in addition to my fiancee and you try and guess which one I'm going to marry".

The next day, he brings 3 beautiful women into the house and sits them down on the couch and they chat for a while.

He then says, "Okay, Ma. Guess which one I'm going to marry."

She immediately replies, "The red-head in the middle."

"That's amazing, Ma. You're right, how did you know?"

"I don't like her."