Amy Halterman and Tammy Slaton’s Sister Amanda Has a Last Name That We Didn’t Expect

The Gist:

• Amanda Halterman is Amy Halterman and Tammy Slaton's sister, who was introduced in Season 3 of 1000-Lb Sisters.
• Tammy and Amanda are often seen butting heads and even arguing on the show.
• Amanda has a special connection to not only her sisters, but Amy's soon-to-be ex-husband, Michael Halterman.

TLC’s 1000-Lb Sisters follows the lives of sisters Amy Halterman and Tammy Slaton, who together tip the scales at over 1,000 pounds at the show's beginning. The pair works together to lose weight as they each run the risk of losing their mobility and becoming bedbound. While Amy has made significant strides in her weight loss journey (and even fulfilled her dream of becoming a mom!), Tammy fell behind for a while before she had bariatric surgery and began her own weight loss journey.

In Season 2, viewers met the ladies' extremely supportive half-brother Chris Combs, who quickly became a significant part of the show. However, Amy and Tammy also have two half-sisters. In Season 3, their sister Amanda Halterman is introduced into the mix, and she is now as much a part of the show as the other extended family members.

Keep scrolling for everything we know about Amy and Tammy's sister Amanda.

“My sister Amanda has no filter. Sometimes she is a little bit rough," Amy says during a confessional in Season 3.

While sharing a meal together during a family vacation, a fight breaks out between Tammy and Amanda, and it becomes clear that they do not always see eye to eye.

In fact, they get into a screaming match. It's not pretty.

It's no secret that Tammy and Amanda have been through a lot. And, more often than not, Amanda is unafraid to put Tammy in her place and speak her mind. Even after Tammy finally got surgery and was no longer nearly bedbound, Amanda wasn't quick to let things slide with her sister.

According to The Sun, Amanda and Tammy's relationship is still rocky after they filmed Season 4 of 1000-Lb Sisters. The outlet reported that after an alleged blowout between Amanda and Tammy, the latter was forced to move out of the rental home she lived in which is owned by Amanda. Talk about family drama. Fans likely hope to see it all play out on the show, but it doesn't look like things are going to calm down any time soon.

When Season 3 wrapped, Grant Gibbs, who is talent associate producer of 1000-Lb Sisters, posted a few behind-the-scenes photos to Instagram. In one of the photos he shared, he tagged Amanda. Strangely enough, if you click on her profile, you might notice something interesting — she goes by Amanda Halterman.

As a refresher, Halterman is the same last name that Amy inherited after marrying her now ex-husband Michael. While it was at first unclear to fans how Amanda acquired that last name, viewers now know that she was previously married to Michael's brother. However, after 22 years of marriage, Amanda and her husband, who is not featured on 1000-Lb Sisters, got divorced.

Watch 1000-Lb Sisters on Tuesdays at 9 p.m. EST on TLC.