woah woah 140 when you're FIVE FEET is fat. Yes it is. I dated a girl who was 140 and about 5'4, and she was thick. a full 4 inches shorter, and you're looking at a porker, absolutely.
See, here's the prob: 5' 0" 140 at 20 equals 5' 0" 170 at 35. Kinda' fat now equals super fat later. Stay away. For further proof, demand to see a full body picture of her mom. Gah-ron-tee she's 5 feet in every direction.