Why would he want another kid? Was it a knee-jerk? But time for reflection was over; she instinctively fought back.
Fighting back at that point, with Tony at his savage worst, was pointless and moreover painful. Her survival instinct resulted in blows to her head, as further struggle waned. Tony would have his way with her... and he did. She was barely conscious as he did. He left, spent but still seething.
Marcia was left, overpowered, overwhelmed and overwrought on her bed. Disheveled and sobbing, her composure was gone.
This was marital rape. Tony must suffer first... then die.