When asked why the vulnerability problem started, Sheridan admitted that is began just six weeks into her second marriage, when her "self-esteem was destroyed".
The 41-year-old mother-of-two went onto explain that she discovered things were going on behind her back, and it made her feel like she wasn't good enough.
"I kept finding more and more things as time went on. I kept digging because I couldn't stop myself and I should've," she said through tears.
Matthew explained that Sheridan needs to give the Single Wives experiment everything she has.
"You giving your all is the beacon that shows the best men where you are."
The Single Wives continues Thursday night on 7
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This article originally appeared on WHO.