Happy Birthday Maya

It's tradition in the Friar family that the mother picks the girl her first son to marry. So when Maya's mom, Katy, and Lucas's mom, Elizabeth, became best friend Katy promised Elizabeth that Lucas would have a future wife the day Maya is born. The tradition states that the 2 has to get married when the girl turns 20 years old. What happens when Maya wakes up in her 20th birthday to a surprise?