Mother Hays quickly clutched Finn's hand afraid he might lash out at her. She knew Rose's mood was very sensitive and a wrong thing can distance Finn and Rose so she didn't want external factors to affect the couple.
Finn patted his mother's hand in the assurance that he won't let his anger out before rushing behind Rose to catch up with her.
He had already heard the change in lifestyle and restricting her to the mansion without giving her brain to work, Rose will be affected psychologically which in turn changes her behavior. Finn hadn't seen those changes with others but he had noticed her irritated for a lot of things.
He didn't want to restrict her either but her health wasn't suited for her to take mental pressure and travel frequently. He had tried to make her understand Aria was active due to her regular workout routine before pregnancy but he couldn't take her name repeatedly, afraid Rose might misunderstand him thinking he was keeping Aria in high regard.
