Double pregnancy loss

Lucy got pregnant young Tim decided to stick around even though it wasn't his. He is listed as the father. They now have a 15 year old daughter named Olivia.
Olivia knows Tim isn't his biological dad but doesn't know who is and what happend.
Tim and Lucy also found out they're having another baby.
Wesley and Angela have Jackson he is almost 16 years old.
James and Nyla have Leah who is also 15 years old.

Jackson is planning his 16th birthday party. He invited a lot of people more than he realised. Wesley and Angela are both working a night shift.
Something horrible happens to Olivia at the party. To find out later the same thing happend to her mom. This forms an unbreakable bound between them.