Just my .02. I wouldn't feel bad about the bike. Personally, I think that smacks a little of cake eating. These are exactly the type of family moments that you don't really get to do if you're divorced.
As to the hanging around for 30 minutes. I can see where that would be awkward - I would chalk it up to being a nice thing for your daughter. I wish my H would let the kids see us together for a few minutes, instead of the hot potato drop off.
