Tom is the acting consiglerie,so he should be there,Vito has to be there( ),but Sonny wasnt there the whole time.He was there with Bonasera,then left then came back when Johnny was there. It seems Vito wanted Sonny there for some of the important stuff so he could learn some things for when he became the Don. Even then Fredo had no chance of being the Don because of Sonny,so he really didnt need to be there. Even though Fredo was his own son,he tried to keep as few people there as possible.
If winners never lose, well, then a loser sure can sing the blues.
),but Sonny wasnt there the whole time.He was there with Bonasera,then left then came back when Johnny was there. It seems Vito wanted Sonny there for some of the important stuff so he could learn some things for when he became the Don. Even then Fredo had no chance of being the Don because of Sonny,so he really didnt need to be there. Even though Fredo was his own son,he tried to keep as few people there as possible.