Catelynn Lowell

These days, most of the stars of the Teen Mom franchise want nothing to do with those infamous reunion shows, and if they take the stage at all, they do so only out of contractual obligation.

Which is why it's so strange that Catelynn Lowell just took part in the reunion for the current season of Teen Mom 2 -- even though she's not one of the show's cast members.

Catelynn Lowell has made no secret that she wants to continue expanding her family.

The mother of three --  who gave her first child up for adoption about a decade ago -- has two little girls at home, a five-year old daughter named Novalee and and a seven-month old daughter named Vaeda.

Catelynn Lowell and Tyler Baltierra have experienced their share of ups and downs over the years.

There was a time when they were considered by many to be the most stable couple in the Teen Mom franchise.

The season finale of Teen Mom OG featured one mother in jail this week and one mother in tears.

We've already covered the troubling scenario of Amber Portwood being tossed in jail after allegedly attacking Andrew Glennon in early July.

After all of the pointless mom-shaming that Catelynn Lowell has endured, it's great to see something positive.

And it doesn't get more positive than the unspeakably adorable photo of Vaeda that Catelynn shared.

Tyler and Catelynn Baltierra are raising two little kids at home.

But these reality stars are actually the biological parents of three kids, having given up a daughter named Carly for adoption back when they were teeangers because they didn't feel prepared for parenthood at the time.

Tyler Baltierra is determined to prove that he still loves Catelynn Lowell, and he's not doing a bad job of it.

On Sunday's Teen Mom OG, Catelynn opened up about her desire to stop breastfeeding baby Vaeda.

As we reported earlier today, Teen Mom OG ratings are tanking this season, with the show pulling in just over 600,000 viewers per episode.

So the long-running reality series would probably be headed for cancelation even if it weren't for the fact that its cast just can't stop assaulting people.

Their trial separation did nothing but prove that Catelynn Lowell and Tyler Baltierre really do love each other.

But the time that they spent apart was difficult, especially because Catelynn was pregnant at the time.

There was a time when Catelynn Lowell and Tyler Baltierra were thought to be one of the Teen Mom world's most stable couples.

We think it's safe to say those days are long gone.

Family reunions are a very special occasion for Teen Mom OG stars Catelynn Lowell and Tyler Baltierra! 

The famous couple, who are both 27 years old, made the responsible yet heartbreaking decision to place their first child Carly up for adoption back in 2009, which was fully documented on MTV's 16 and Pregnant. 

On Monday night's episode of Teen Mom OG, Novalee had a meltdown when her mom left to go to the spa.

Fans jumped on Catelynn for giving her daughter "abandonment issues," and Tyler was quick to defend his wife.

The current season of Teen Mom OG has seen Catelynn Lowell and Tyler Baltierra facing some daunting obstacles together.

Things pick up right after Tyler and Catelynn's trial separation, which has clearly taken quite an emotional toll on each of them.