Just gonna throw in my late 2 gil here:
About leaving Marlene alone to look after a bar -- like Force said I doubt that AVALANCHE actually left Marlene alone to run 7th Heaven by herself/serve drinks to patrons. They could've easily left a sign on up front that said it was closed and if anyone in the slums had a problem with that or forced Marlene to give them drinks, they would have a very angry dad with a gun arm and a bartender who can beat your ass to down to hell and back 7 times around to deal with.
as for the
Tifa
Cloud! I got a message from the Weapon Shop man upstairs.
He has something he wants to give you. Don't forget!
Marlene, you watch the store while we're gone!
Marlene
All right!! Good Luck.
Take care!
Well, Marlene's at that age where's she transitioning from a baby to a Big Girl, so I kinda figured that Tifa telling Marlene to "look after the store" was something similar to what my mom did to me when I was 4 years old she had to leave me *alone for a brief periods of time (like 30 minutes) to pick up my sibling from elementary school or whatever-- "You're a Big Girl now, so be good." Like instilling a sense of "responsibility", so to speak. Though leaving a 4 year old at a bar in the slums isn't exactly the best way to make a growing kid feel responsible.
As for Barret leaving Marlene behind again in AC: I have slightly mixed feelings about Barret leaving behind his kid like that, but in things like settling his past/guilt/atoning for his sins, I think it would have been incredibly selfish of him if he involved Marlene in things like that -- Sure she experienced a lot of stuff in her life and is super mature for her age, but Barret's issues should not be Marlene's problems, and he's trying to settle his past so that it doesn't haunt Marlene's future. Kids shouldn't have to pay for their parents' sins and all that.
I guess I'm just reiterating what others say at this point: Barret may not be the best parent, but I think that he's a really loving father and truly cares about Marlene. At least he's a better father than my dad.
Soooo my vote for best parents? Seto, Elmyra, Iflana, Reeve and Cloud's mothers, though I used to have slightly mixed feelings about Cloud's mom. xD
*
By alone, I mean my aunt had to be lurking around. Apparently I really didn't like it when it was obvious that I was going to be babysat, so my mom and my aunt had to be very very subtle about it and had to make it look like I was all by myself. xD;