What comes after 5...

Yesterday in the car after dropping Katharine and Julia off at school we were driving to daycare and Lincoln asked me what comes after 5. I clearly told him 6 wondering where the conversation was going...to which he replied, "So when Katharine turns 6 on her birthday will she still live with us?" I suppressed my laughter to the point of getting hiccups later. And said, "Yes buddy, she will still live with us when she turns 6!" In my mind I was debating if Lincoln was happy with my response or if he was hoping she wasn't going to live with us any longer. There are days when they bicker and I think he might have been hoping she wasn't but then there are those times when they get along famously and I know he would be sad if she wasn't around.