But remember that if she played the last turn, you lost the points value of any tiles remaining in your rack, and she gained those points. So if you had letters totalling 15 points, your final score would go down from 299 to 284. Her final score would be what she actually earned plus your 15 points you forfeited. Hence her 303 pts.
Highest Single Move "Words With Friends" Score
But remember that if she played the last turn, you lost the points value of any tiles remaining in your rack, and she gained those points. So if you had letters totalling 15 points, your final score would go down from 299 to 284. Her final score would be what she actually earned plus your 15 points you forfeited. Hence her 303 pts.