In 'Snow Jobs (Part 2)' , Amber Horn first mentioned that she was pregnant and that Matty McKibben's the biological father, to him, Jenna Hamilton and Sadie Saxton. Sadie didn't believe that Matty was the father and that she was even pregnant. Later she took the pregnancy test and it was positive, shocking Jenna and Sadie.
In 'Finals' Matty decides to investigate Amber's lies and finds out from Valerie Marks(who announced during assembly that someone's pregnant) who accidentally revealed that Gloria is pregnant and also found out that Gloria was wearing his mother's missing earrings. Finally, Gloria walked in on Amber using a pregnancy test and convinced Gloria to take it for her, promising her that her secret is safe with her.
