Mmmm, yeah, but I don't full support this attitude. Sometimes the meeting every week, come sun or shine, and at the expense of other activities makes gaming feel like a chore to me. And sometimes gamers need a break for some variety. The play may be a one-shot thing for her, the game is there all the time evidently.
I've been on both sides of the fence, bowing out for a date as a player and being yelled at by a miffed GM -- as I give him notice several days in advance -- and then as a GM waiting for an unreachable player who decide just not to show and tried to blow me off because "it's just a game."