If that child, really fetus, is inside your body, no, I don’t think you have to continue letting the fetus use your body. Because that’s what it is. No one would force a woman to breastfeed. No one would say you legally have to use your boobs no matter what to feed this child. That’s what being pregnant is.
And no, you are continually side stepping and not telling me how you’d feel. How would you feel?