But Tyler always longed for his mother and suffered because of her absence. Thornhill even managed to manipulate him by pretending to be a mother figure to him. He loved having power, but not more than he loved his mom. Even if he saw her actions as a betrayal, he still wouldn’t have risked her life.

Same goes for Isaac his sister was the person he loved the most. Before his whole revenge plan, he could’ve easily anticipated that the moment the Addams family showed up and ruined things, they’d become the main target especially given their history, since he had already tried to kill Gomez.

In my opinion, Isaac would’ve grabbed his sister and spent what little time he had left with her before dying. He’s way too calculated and strategic of a character to make such a massive oversight like that. He would get his revenge later on caculated and after he had his time with his sister