[Amy gave me the go-ahead to post out of turn.]
Erik had no idea what Dom was getting at, considering he had been chiding her and yet she started talking about her sister. He kept his mouth shut after she walked away, though. It wasn't really in his nature to judge people - at least not vocally. That was not something he ever did. Perhaps he was actually looking at himself at the same time, wondering why he had found a way to jump in when they hadn't found a single answer, but Dom couldn't go for someone like this other guy.
Declan, for what it's worth, didn't like the words that had left his mouth. He hated them, actually, after they made her leave. Sighing, he looked upwards before letting himself shake his head at Victoire. "Brilliant. Helpful, Vic. Thanks."
Erik looked over to Victoire, eyebrows raised, but Declan didn't stay to elaborate or discuss.
With that, he turned and went after Dom, despite his gut telling him that perhaps she needed space. They couldn't leave things like this, or he would have to leave the party without her. He couldn't stay and pretend he fit in if Dom didn't even want to be there. His strides were longer than hers, thanks to his height, so he reached out, managing to brush her arm as he caught up to her.
"Dom," he attempted. "Dom, don't be angry with me. I didn't know what to say, and-"
"Declan. Arryn."
He froze, then jerked away from the hand that reached for his wrist, lifting if over onto the shoulders of yet another blonde standing in the Weasleys' backyard. She held firm, though, draping his arm around her. Her voice had been amused, but also held the tone that made her smirk all the more obvious.
Declan's expression, on the other hand, was one of incredulity and rage. He opened his mouth to chide her and tried to pull away, but then she said exactly the right thing.
"Don't make a scene, Dec. Not in front of your... friend's family."
His eyes narrowed sharply but he said nothing for a moment. Her free arm curled around his middle and he winced, looking towards Dom, a sort of frustrated helplessness behind his eyes. "Dom, love," he began, emphasizing the endearment much to the other woman's distaste, "this is Danica."
Suddenly, he realized how foolish he was being.
"What are you-? Why are you here?" He asked, stumbling over the questions. His hand, where it was supposed to relax over Danica's shoulder, curled itself into a fist.
"My company was hired to cater, and I wanted to make sure everything goes as it's meant to," she returned cryptically. "Some woman hired me. I assume you know her, considering she's with the family."
"...Who?" he asked, biting off the word.
"Um, a Roxanne, I believe?"
Declan did yank away from her at that, stepping out of her hold and moving between her and Dom. "Why are you doing this?" he demanded, keeping his voice low enough that they hopefully wouldn't draw any attention. He didn't catch the way Erik was watching them, though.
"You know why."