It was in the Forrest Gump universe.
So, It's basically just like the movie, until Forrest discovers his his son. Because at this point, Jenny says "Forest... Your going to have to take him. I'm moving to ___." (i don't remember, It was either India or Turkey)
So Forrest takes Forest Jr and it's the last time he sees Jenny. Then my dream was fast-forward about 5 years. Forest (senior) ends up with a girl (again, I don't remember... let's call her "Janet") and moves into an apartment with her and Forrest Jr.
One day, Forrest and Janet where down stairs at their apartment, when they suddenly realized that the complex party was today. "Forest