i'm dying for family for this guy! she could be his step sister? his parents split when he was 3. he has his step father's last name so if you went with her dad marrying his mom then her last name would need to be baker. otherwise her mom could have married his father. either way is cool with me! he's not super close with his dad so if you want them to be pretty close from the time they were young going with her dad marrying his mom would be the better option but we can work with either!