Logical?

My daughter was coming down the stairs, and discovered several pairs of size-3 underwear strewn over the steps.
She stopped halfway down and asked the kids, "What's all this underwear doing here?"
"D wanted to wear it on his head like a hat," K answered helpfully. (As if that explains it-but never mind.)
She said to D, "Pick up the underwear and give it to me so I can put it away." D picked up the pairs of underwear and flung them up in her general direction. She managed to catch a few pairs. "Please hand them to me," she asked D.
"Mommy can't bend down to pick them up because her tummy is so big because of the baby," I added.
D picked up the underwear and handed it to her, along with a kipah that also happened to be on the steps.
She gave the kipah back to D and said, "Here, put this away in the closet," at which point D took the kipah and flung it down the steps in the general direction of the closet.
"Please pick it up and put it in the closet," She said, wearily.
"Bubbie can do it," D said. "She doesn't have a big tummy!"