Ron didn't knw what he correct answer was going to be. Should he out-and-out deny it? Claim it was too dark to see anything but her hair? No, she was smarter than that. Commenting on all of it also seemed the wrong route, it was no secret that Lavender had changed since the war. He stood there, facing away from her for an almost uncomfortable amount of time until, "Not on purpose, no."
He peaked back over his shoulder to see if she was dressed, then turned to face her again, "But yeah, gotta be safe in numbers right?"