"…I'll be back in a bit." Rowan was waiting for Duke to return earlier, so the kids wouldn't be left on their own. Now that another child wanted to get babysat, Rowan had to get to the restroom first. By the time the auction started, there would be no more time to leave.
"Take care," Duke whispered, but his eyes were still on Scott. He noticed how Scott wanted to follow the other person, but the weight of his gaze kept Scott seated. It was better to keep this man here than hear about Rowan stabbing Scott in a bathroom again.
As for Rowan, he really went to relieve himself in the restroom. He just reached the empty restroom and made use of a stall instead. He didn't want anyone sneaking up on him, with his fly open. It was just that when he exited the stall to wash his hands, he saw someone waiting patiently by the huge garden sink.