A baby card board

A couple wanted to have a baby but for some reason they could not have conceived a baby. She thought that was her infertility and he thought that was his disabililty. One day after work, he stopped by a novelty store and bought a baby card board to supprise her. She felt insulted. Was that supposed to be funny ? An actulal size baby card board. I was watching S.I.T.C on tbs. Very funny.