Breast Expansion Party Trick

I find you alone at a party we're at. I flirt with you before moving on to wanting to have sex with you. I decide to speed it up, since we're not really supposed to be in here right now. I cast a spell and make my breasts grow a few times. I show off and we move into having sex in cowgirl with no penetration shown, just a close up of breasts bouncing and face. After this, I kneel on the floor in front of you and encourage you to cum on my tits.