Which starter did you get? I have a few suggestions, hopefully they aren't all included in the set. I'm assuming she would mostly be interested in black teas, but oriental beauty (oolong #40) is something she might like as well.
Those are the main ones I would suggest, but I don't know much about your mom's tastes. All of the samplers look pretty good to be honest, so you might consider grabbing one of those. Hope this helps.