Nonetheless, she acknowledges that "people tried to tell" her that Josh wasn't the man she thought he was, but she "just made excuses for him." The mother-of-two says, "I'm now opening my

Nonetheless, she acknowledges that "people tried to tell" her that Josh wasn't the man she thought he was, but she "just made excuses for him." The mother-of-two says, "I'm now opening my eyes to what a horrible man Josh has been. He has been a lie."

Last August, she announced she was parting ways with Josh as she believed he had kissed another woman at a Texas bar. She ultimately got back together with him though, because her mother encouraged her to take him back. Mackenzie recently told E!, "She said, ‘My story is not you and Josh's story but there were times I wanted to leave your dad. He would do this and that and he would make mistakes but we did have our hard times but look at your life. If you don't forgive each other and learn to give your marriage to God, then look how different your life can be'."

However, Mackenzie won't tolerate Josh's behavior anymore. She promises in her post, "Today is the day I walk away."

E! News has reached out to Mackenzie and Josh for comment.