So like Neil is racing Lynette to the hospital as her contractions are very close together. Suddenly she's like,
Lynette: "OMG, the baby's crowning!"
Neil turns around and gets a facefull of a vision no father wants to remember, he's like:
Neil: "Oh My Fucking God!"
And then Bang! They plough into a bollard on the side of the road, Lynette is mashed as the car concertinas, causing the mc to rocket out through the front window and headbutts Lana as she's walking by, carrying her young sister on her shoulders.
Lana's lifeless body slumps to the ground while Jill, who is too young to understand what's going on (she doesn't understand shit and she's in her 20s, so imagine how clueless she'd be as a 3 year old), starts playing with the baby:
Jill: Baby!
And there we have it. Jill finds out and blames the mc for her sister's death. The mc finds out and blames his dad for his mother's death. And Jade finds out and finally understands why the bollard outside her building has been bent for the last 19 years.
Alternatively, Jill, who is only a couple of years older than the mc, looks to be 5 or 6 years old on her sister's shoulders in the photograph. This means Lynette died years before Lana. Meaning their deaths aren't related at all.
Nah, the first version is better, it also explains what's wrong with the mc's face...