Meet the three families of Unexpected as they face the challenges of teen pregnancy and parenthood.

Lexus is fifteen and about to be a mom.

A teen mom herself, Kelsey never imagined her daughter would follow in her footsteps. Now she's about to become a grandmother.

Lilly vents to her mom how lonely she feels now that she's pregnant and her friends have moved on.

McKayla's birth mom surprises everyone when she shows up to prom pictures.

McKayla and her Grandma try to find a prom dress at 32 weeks pregnant.

McKayla shares the details of how she grew up and what it's like being pregnant at the same time as her mom.

Lilly becomes upset when James doesn't take the Lamaze Class seriously.

After a false labor scare, Kelsey realizes Lexus and her boyfriend are not prepared to be parents.

Shannon (McKayla's mom) tries to resolve her issues with Shelley (Caelan's mom) over the phone.

Surrounded by her family, Lexus deals with labor pains in the hospital.

Tension continues between Shannon and Shelley at McKayla's baby shower.

Disappointed by James' behavior, Lilly has dinner with her family to lift her spirits.

Lexus and Shayden talk about the responsibility of parenting.

James gives Lilly a ring.

McKayla en route to the hospital with her grandparents.

A teen mom herself, Kelsey never imagined her daughter would follow in her footsteps. Now she's about to become a grandmother.

Despite his differences, Nick is always ready to take on the world.

Nick works with several engineers in trying to drive a car without any limbs. He's not confident it will work.

A look back at some of the cutest Gosselin moments to date

Tempers reach an all-time high as Kate, Jamie and Ashley argue over a piece of pizza.

Kate discusses her post divorce relationship with Jon Gosselin.

Kate and the kids react to the show ending.

Kate's best friend Jamie and babysitter Ashley share the drama they've endured during the RV trip.

Kate dishes on life as a single parent.

On the series finale of Kate Plus 8, the cast reflects upon the final moment of the show that caused a massive breakdown.

Kate looks back upon her and Jon's relationship, divorce, and future.

Collin and Joel try to tie their jackets around their waist while on the boat in Alaska.

The eight kids get to mix and match a treasure chest of costumes. Find out their favorites!

While in Australia, Kate & the kids having funning cleaning and feeding tortoises.

As the Gosselin kids get ready for school they share their favorite school subjects and Kate chimes in with a personal realization.

While on a rafting trip, Ashley bribes Kate's nanny with $100 to soak Kate with water...