Katie wasn't exactly thrilled about Pucey, but she had her own stuff to worry about right now and she'd reached an unspoken agreement with Ali to tolerate the relationship even if she didn't like it. She thought her friend was foolish to trust a former Slytherin, but she wasn't going to push Ali away by pressing the issue continuously.
She opened her mouth to object to any of the others going first, but she knew that the twins wouldn't be dissuaded. They could really be quite chivalrous when they wanted to be, she knew, so she closed her mouth again and nodded. Both to the plan and the reassurances that everything would be alright.
She apparated out a second after Fred did, anxious to get this over with and trusting that the others would be right behind them.