Opening meld

No, don't you need TWO sevens? I'm not an expert by any means, but I would say she could pick up the 7 from the discard pile, add it to the two 7s from her hand, lay them down for one meld of 15 points, then lay down the 2 aces and the wildcard to make another meld of 40 points plus whatever the point value of the wildcard is. Wouldn't that satisfy the initial meld? (I imagine the initial meld value is 50 points)