If her decision was wrong then she would not allow anyone condemn her. She was doing all she could to protect herself and the ones she loves. If staying with Grandma Lily would not protect her that means Grandma Lily was in danger too.
So she didn't regret her choice to go back to the DEN's house. Because. Now she refuse to mind-numbing herself and wait for them to do something, she wanted to do something.
She met Countess drinking from a glass a red content inside the kitchen.
"Oh, look who finally show up." Countess clapped with the champagne flute.
"Where are the rest?" Gracie asked, dropping on the kitchen island her heavy backpack which she filled up with some clothes and necessary basic things.