The Doctor rolled his eyes at the Master, and reached out to put a hand on Jack's shoulder, asking without words for him to wait a moment.
"You, old friend, can wait over there," he pointed to the front desk, "a moment. We need to talk." He turned back to Jack, an easy smile on his face a moment before he stepped into Jack's personal space, angling in to kiss him, brief and hard and what he'd been wanting to do since he'd made up his mind to go back to Cardiff and ask Jack to come with him. What he'd wanted to do a regeneration ago, and avoided because Jack had felt wrong to him then.
Well, and he'd been a bit of an idiot about personal stuff.