As the woman watches, amused, you begin to feel swelling again. You stare into the mirror, wondering where any more teats might grow. Your entire torso is covered in breasts! But the sensation isn't on your torso - it's coming from between your legs. You start in panic. You are already so heavy and uncomfortable, how is this supposed to work.
You reach down to feel between your legs and you are immediately shocked to find that you don't feel your vagina. You try to pry your breasts apart so you can look down there, but there are too many and you are too off-balance. You lie down on the cushion again and point your crotch at the mirror. Looking up, you can see two more teats with thick nipples growing between your thighs, and your vagina slowly moving back.
"Ah, yes," said the woman, "I wondered when this would happen. You see, the vaginas of four-legged animals like pigs is located in the very back, right next to the butt. It looks like she's run off to make room for your very densely-crowded boobies. Ha!" She laughed in genuine mirth. Your emotions swing from anger at her to confusion about your body.
Then the familiar pleasure takes you and the teats between your legs swell up, pushing the nipples far out away from your body. When you try standing again, not only are you off-balance, but you have to stand bow-legged to accommodate the new teats.
"Your body must be thirty-percent mammary glance, right now," the woman laughed. "Don't worry, though, it won't stay that way."