Prior to Spike's wedding to Archie, Emma learned that Spike was pregnant and was considering abortion, though her mother swore her to secrecy. Emma chose to tell Archie anyway, and Spike and Snake decided they wanted to keep the baby. A healthy baby boy was born and Emma, as his older sister, often had to look after him while she was living at home during high school.
In White Wedding (1), Emma discovers that Spike is pregnant with Jack before her wedding.
In White Wedding (2), Emma tells Snake that her mother is pregnant and is considering an abortion. Snake confronts Spike about this, and the two decide to keep the baby and get married, despite being a hour late for the service.
In Fight for Your Right, Emma boycotts the lunch room because they serve genetically-modified foods and which gets her in trouble with Mr. Raditch and he sends her home for the day. Emma is waiting for Snake to come home, expecting a lecture. When he does, she tells him to get it over with, but he tells her he's not going to give her a speech. She reveals the two options that Raditch gave her and exclaims that she can't apologize for something that she believes in. Snake tries to reason with her, telling her that there are bigger battles to fight, but she asks whether or not Snake would be comfortable with the new baby eating the GM foods.
In Father Figure (2), Spike suddenly goes into labor at home, and Jack is born a healthy baby. The family takes a several pictures with the newborn.
In Pride (1), Emma says she isn't sleeping because of Jack's crying.
In Pride (2), Snake asks Emma if Jack looks more like him or Spike. However, he say that he'll look more like Jack due to developing leukemia, which would cause him to lose his hair.
In Accidents Will Happen (1), Spike brings Jack to Emma's gymnastics meet.
In I Want Candy, Jack and Emma are with their family when they learn Snake's cancer has gone into remission.
In Anywhere I Lay My Head, Spike brings Jack with her to Emma's parent-teacher conferences.
In Turned Out (2), Jack has been sick a lot lately, so the entire house is happy when he is asleep and they can have some peace.
In Our Lips Are Sealed (1), Emma and Manny are babysitting Jack.
In Don't You Want Me? (1), Emma and Manny are watching Jack, and he is playing with Manny's cell phone. When she gets a call and the phone is still in Jack's hands, Emma smiles at him.
- There is a 14 year age difference between Emma and Jack.
- Spike was pregnant with both unexpectedly: Spike was pregnant with Emma when she was 14 and Spike was pregnant with Jack before her wedding to Snake.
- Emma usually babysits her brother Jack.