"I'm glad we're on a vacation from work," Ianto remarks, a bit of his usual dry humor creeping into his tone. "I don't think I'd feel comfortable ordering my boss around." Even here he still thinks of Jack as his boss, at least when it comes to taking the lead in dangerous situations, but its different, and it helps to make things less complicated.
He finds Jack's forehead for another quick kiss. He likes the calm they're sharing now, so different from the intensity of what they've just done. It's a nice contrast that somehow makes this all the more sweet.