No, fat people need to be given it straight. Besides, if she's chubby now, she'll be a lard ass when she gets older. Or you could sprinkle some DNP powder on her donuts.
i don't wanna be a dick, but 150lbs? That's low any way you slice it. I was a twig in highschool at 15 benching that. The only reason dude gained so much on his bench is because he was so far away from his physiological max. Try taking the same dose while bench 315, you will no jump up to 385.