Let her know that distractions when playing can instantly cost money. Plan ahead for time you will be playing, and make an effort before starting to get everything settled first. Give her the courtesy of saying something like... "I am going to want an hour of un-interupted time to work on-line, is there anything you need before I do?". Do it every time, and be willing to devote some time to her needs before you start.

She'll appreciate the effort, and eventually will learn to respect your time. Hell if your good, tell her "Baby, i'm working toward that (xxx) you've been wanting", if that doesn't work, I don't know what will.