The pair met while attending a rehabilitation facility in Ohio, where they both received treatment for obesity.
They married in November 2022, but their romance was short-lived and they split up just a few months later.
It’s been revealed that Willingham’s cause of death was due to natural causes.
Tammy continues to post on social media to share her progress – as well as uploading inspiring messages to help those on a similar journey.
And now fans are in awe of the reality star as she shows off her transformation with a picture of her wearing a swimsuit.
Posing next to her friend Haley Michelle – who often posts pictures of her and Tammy hanging out together – she is sat in a swimming pool in a blue, mermaid-printed suit.
Michelle uploaded the photo to her Instagram, with the caption: “Proud of you #tammyslatonweightloss.”