Jewish Mother to guess which one son is going to Marry

A young Jewish man excitedly tells his mother he's fallen in love and
that he is going to get married. He says, "Just for fun, Ma, I'm going
to bring over 3 women and you try and guess which one I'm going to
marry." The mother agrees.

The next day, he brings three 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 one on the right." "That's amazing, Ma. You're right. How did you
know? The Jewish mother replies, "I don't like her."