Spoilers ahead.................
It's kind of sad that Indy will be an unwilling or unknowing deadbeat dad. I wonder if that'll effect him at all, given his regret at his lack of a close relationship with his own father. Since Mutt's his son, and is about 19/20, that's 20 years he's missed out of his son's life, unwillingly much worse than his father. At least his father was there, even though he was distant. It's kind of sad to see Indy's family cycle repeat itself in that way. I wonder if that'll effect Mutt or if Indy will be angry at Marion for that.