Stacy is awestruck by your beauty. Awestruck and something else. Not jealous, though. She doesn't look jealous at all. You're a little disappointed, then puzzled. There's another expression on her face. You're just starting to figure it out when Stacy makes her wish. "You're so beautiful" she says "I wish you were my sweet, loving, adorable girlfriend."
You suddenly understand why Stacy was uninterested in your advances. Just as well, since hurting sweet, wonderful, beautiful and as you now realize totally gay Stacy is the farthest thing from your mind. You feel a lot better about being female as well, since that's what enables you to be the loving partner Stacy needs. And female bodies, particularly Stacy's body, are starting to do things for you again. Stacy's look was one of desire, and you are thrilled by the fact that you have a body, and, thanks to her wish, a personality Stacy wants.