Her chest (same as you)

You mom strains to climb in the stocks the same way you had, just above the stomach. Despite being just a torso, you are still able to release the blade chopping your mom in two.

“Phew” she grunted as she fell to the ground, “it’s nice to finally get the weight of my stomach off. I might have to stay like this for a while” You look at her walk on her hands as your torsos stand at idle. “Walking on my hands is uncomfortable... I need legs. I just don’t want mine.” She looks at you, “Say, would you do your old mom a favor in taking my lower half for the day? I had to carry you around for 9 months, it’s the least you could do.”