JAck chuckled a bit and looked at them "Uh huh most defiantly." He was grinning a but he didn't seem to know that he was embarrassing the Doctor. He was enjoying watching the two of them kiss.
The Doctor blushed upon hearing Jack, he looked at Rose and he pulled away from the kiss. He always felt like Jack had to ruin a moment like that. He was trying to not focus on a future without Rose, was too painful.