The last looks like he just broke a piece of very valuable china ... it is flower petals only, as we can see, but his "Oops, you caught me" look and the petals just seem to suggest that to me. Very nice.
The middle photo is also really cute. I like that one, and I am sure your sister (I take it it's her holding him?) will put it into a frame and onto the mantelpiece!
The first ... yes. Weddings are tough, hm? Make you tired! Cute, too.
My 2 cents...
1. I like the capture. Must be time for bed!
2. Good smiles!
3. Little soft and a little bit of motion blur (I'm sure from the poor lighting as you mentioned).
#1 and #3 would be better if there was eye contact, but sometimes you can't help that. I like #3 the best, although I would prefer a tighter crop. I love the smiles.