'1000-Lb Sisters' Clip: Amy Doesn't Know Tammy's Husband's Last Name

They aren't the Slaton sisters anymore.

Cheers to the bride and groom—whoever he may be.

That's certainly the attitude Amy Slaton has in this exclusive peek at the March 21 episode of 1000-Lb Sisters. In the clip, Amy toasts sister Tammy Slaton following her nuptials to Caleb Willingham but struggles to remember the latter's surname in the process.

"You've always been my big sister," Amy starts her speech. "We've always been Amy and Tammy, Amy and Tammy, the Slaton sisters."

Amy, who is married to Michael Halterman, continues, "But now it's like, Amy Halterman and Tammy—what was your last name? I'm sorry."

Tammy quickly chimes in, reminding her sister, "Willingham."

Amy further struggles with Caleb's last name when speaking with producers, referring to him as a "Wilmington."

Related: 'Sister Wives': One of Kody Brown's Kids Is Changing Their Last Name

And while the moniker mixup is funny for the wedding guests (and viewers at home), Amy reveals that Tammy's rebrand has her shaken up. She emotionally shares in a confessional, "It's not us no more. We're not the Slaton sisters no more."

"It's just butter sweet," she adds, "to end that era."

Tammy and Caleb tied the knot in November 2022 after meeting and falling in love at the Windsor Lane Rehabilitation Center in Gibsonburg, Ohio. As seen in the sneak peek above, the nuptials also took place at the rehab center, with Tammy's loved ones all in attendance.

"It was the best day of our lives," Tammy previously told E! News of the special ceremony. "There was so much love in the room. I'm thankful that so many family members and our family from the rehab were able to come."

See how the rest of Tammy's wedding plays out when the new episode airs Tuesday, March 21, at 9 p.m. on TLC.

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