Begin Again is about Her and Jake's secret baby.
"I've been spending the last eight months thinking all love ever does is break, and burn, and end, but... I watched it begin again."
Eight months is roughly the time from when She learned She was pregnant up until She gave birth. During Her pregnancy, She was heartbroken over Jake but once She gave birth She saw love begin again because She loved Her baby.
"You throw your head back laughing like a little kid... On a Wednesday in a cafe."
Obviously, She couldn't keep the child, who would've been around 2 years old (a little kid) and She secretly met up with the child and its legal guardians in a cafe.
Truly our Joni Mitchell
