Buffy was used to taking the reigns when it came to escapades like this. She was used to giving the directions and telling people where to go and what to do. Not that she was some power hungry Slayer or anything, but it was kind of odd to be looking to someone else for direction -- at least, someone who wasn't Giles or even Willow herself. But Peter's plan made sense and sounded like something Buffy would've thought of herself, so she agreed to go with it. It didn't matter, so long as they got Willow out safely and all survived themselves.
"Alright, sounds good," she replied with a nod, then moved towards Xander and started walking towards the house. She watched as Peter opened the front door his own way, then continued on around to find a way to enter in the back of the building.
It didn't take long before Buffy spotted a window on the back wall of the house, and she didn't even hesitate as she rammed an elbow right through the glass, shattering it and making an entrance for Xander and herself.
"Come on," she said to him, nodding towards the now-broken window. "Let's go get Will."