And the next best non-committal thing Sinclair can do is stand there and leave himself open for a hug without actually initiating it. It's not that giving Jack a hug is the last thing he wants to do or anything like that, in fact looking at Jack now he feels a great sympathy for the kid. He's not sure what he would have done at Jack's age, early to mid-twenties, forced to fight for his life and kill his own father. He's not sure he would have made it out of a situation like that with his sanity 100% intact.

But Jack is still technically a stranger, despite saving Sinclair's life. And the trust that Jack is apparently willing to place in Sinclair already, while it should be considered a win on a business front, is actually somewhat disarming. This doesn't have anything to do with business, but it has everything to do with a scared, lost kid who doesn't really know what else to do. How can he not feel sorry for him? So sure, if Jack wants a hug, why the hell not.