Sad story and sad situation for sure. Sorry to hear of your loss and hopefully you guys are doing well and starting to heal and move on. I have a 14 month old son and I know that someday in the future we will be in the same situation when our dog King is no longer with us.
Jacoby and King are like best friends although sometimes you have to remind Jacoby that you need to be nice to your friends. He will be petting King and then all the sudden he's doing the bowling ball hold using King's nostrils as finger holes, or he's stretching King's jowls out like a set of wings, or poking Kings eye, or etc etc etc. All the while King will sit and do nothing, occaisonally looking at my wife and I as if to say "Seriously, again?" as we get Jacoby to stop.
King isn't the easiest dog in the world and there have been times when I swear I could have strangled him but he is always beyond excited to see me and get some attention from me or my wife. Watching how he handles my son's "attacks" reminds me that in the end he is a great dog and is definitely part of the family.