Don't know about the first, but this question is a definite yes...presuming the crew likes you. Seen it many times. You just need to make friends with the crew because it's their discretion. I can't imagine why they'd say no unless they didn't like you. I imagine as long as you don't seem entitled and whatnot they'll be very obliging. Even more helpful if they find your kid cute. 22 months is right in that sweet spot where I would expect the crew to get all excited.