You hate her so much, and you pour all your hate into each thrust. The woman's torso begins to feel hot, and you realize that this is the heat of transformation, only this time it's happening to her. You don't know if you will be able to finish if she becomes more pig like.
Her torso softens, and you feel plump padding overlay her tummy and chest. You realize how similar you both are, but then the woman's layer of fat becomes thicker than yours. She is grunting and moaning, but you don't know if it's the pleasure of sex or the pleasure of transformation. She looks at you, but this time her expression is softer instead of full of hate.
Then, everything about her is soft. You find thrusting to be more difficult as you are laying on her pudding-like torso. But after a few moments, it's no longer just pudge. You feel thick nipples emerge beneath your skin, and the layer of fat starts to turn into the distinct texture of mammary glands. Her breasts seem to double in size in the timespan of three thrusts, and then five more pairs of boobs explode running down her torso. She gasps for air with all the new weight on top of her, and you don't let up. You touch her sides, feeling rolls to match each new pair of breasts. You find yourself immersed in her body, with rolls and breasts and nipples all around you. Your face is buried in the middle of her upper four breasts, and others continue to sprout between your body and your arms. It's all you can do to hold yourself up. As much as you hate to admit it, you find the new breasts and their great size very exciting and wholly unique. You gyrate your body so as to rub along as many nipples as possible. You are both sweating, and her body and all those contours become sweaty.
The woman screams in pleasure and reaches her climax. You thrust even harder, grabbing onto whatever rolls of flesh you can. The sensation of drowning in her sea of breasts excites you so much that you finish immediately after she does, without any prior warning. You can't pull out, not with all the sweat, so you just lay there, pulsing and shuddering, swimming in her bloated body.
When it's over, you roll to one side, sliding out of her. Your penis is at least two feet long and as thick as your arm had been when you had man arms.
The woman recovers from the intense orgasm and finally looks down at her torso, full of big nipples and fat teats, side-by-side, running from her upper chest down to her crotch. "What is this?" she bawls, hopeless. She can barely stand. After a minute of effort, she pushes herself up to a cushioned bench and sits there, her breasts spilling out everywhere. "What have I become?"
In that time, your penis had begun shrinking and your balls retracting. A minute later, you were back to being a woman everywhere except your head. You flick at your nipples, disappointed. But when you look at what happened to the woman's body, you are happy you didn't become so grossly bloated. She sits and shivers, angry and upset. "I don't want to be a pig," she cries. "I don't want to be so fat!" Again, you resist the temptation to comfort her. She is cute, but she is evil, and she is getting what she deserves.
The white heat of transformation comes over you again.