Blowing Up Your Girlfriends Tits Belly

Its my birthday and as I blow out the candle on my cupcake, my wish for my girlfriends boobs to grow it comes true after a few moments she comes back with huge boobs (balloons under shirt). Shes pissed at first, then intrigued due to how hard I am. As its your birthday she lets you fuck her with her big boobs bouncing up and down as she rides yon top of you and lets you fuck her missionary legs apart and afterwards, when she leaves the room a scream is heard and she comes out pregnant with a big belly (another balloon) and she curses at me once again.