The Doctor looked at them strangely "Well I've never seen Jack settle down with one person." He said grinning. He seemed rather amused. He lowered his screwdriver once he was sure they were normal.
Jack blinked and looked at them "Well I can settle with one, I just hadn't met the right person till now." he smiled and then kissed Caitlyn. He knew he would live forever and outlive her, but he didn't want to focus on it.
He smiled at them.