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A dad-of-three shared an emotional post about him and his ex-wife's new husband becoming pals after years of fighting.
Divorcee Sean Whalen said he and his ex's new husband Justin Williams suffered five years of "contention and resentment" because - to put it simply - he "hated the guy".
However, the 'How to Make Sh*t Happen' author says it was the "highlight of his day" when Justin walked in, gave him a big hug and said "happy thanksgiving, man" as they celebrated as a family last Thursday.
Summer, 40, met Justin soon after divorcing tech entrepreneur Sean in 2012 - and the business owner admits he came "really close" to a physical altercation with her new man on more than one occasion.
Now in a "good place", the Utah native posted a heart-warming photo of him and Justin preparing dinner together and urged fellow divorcees to forgive their exes for the "peace and freedom you will find".
His post read: "It wasn't too long ago he and I stood in the front yard of my ex wife's house damn near throwing down with police en route.
"Today he and my ex and kids all had Thanksgiving at my house and when he walked in he gave me a big hug and said 'happy thanksgiving man'. That hug was [the] highlight of my day.
"I know a lot of you reading this are divorced. A lot of you reading this had kids split between two homes. A lot of you reading this are dealing with anger and bitterness and pain and fear and loss," he continued.
"I FEEL YOU. I hated this guy. I hated that he was around my kids. I hated that he hugged them and tucked them in at night.
He added: "One of the single greatest struggles of my life was my anger. My bitterness and resentment towards my ex and our divorce. Justin naturally wanted to protect his new love and I wanted them both to hurt. BECAUSE I HURT.
"The most difficult thing I've ever done has been to build a relationship with BOTH of them. Not just my ex, but with Justin as well."
Sean said at a low point he even contemplated taking his own life, but woke up the next day knowing he had to find a way out of his anger and resentment.
He shared: "I could tell so many stories. I have so many reasons to be 'mad' and to hate them both. But I learned that building a relationship with them wasn't for my kids or for us, going into the deepest parts of my pride and ego and soul to learn to love them, to truly love them, was for me.
"What kind of man was I if I hated my children's mom? What kind of man was I and would I ever be if I carried anger and bitterness towards him or her regardless of all the BS and pain?
"I know a lot of y'all reading this right now are angry. You carry weight and say 'well he or she did [...]'. Trust me, friend, I GET IT. When God made me he gave me an extra portion of pride and ego so I know full well how deep this shit runs, " he added.
"And I want you to know one thing. You MUST love your ex for one reason. You must forgive and truly love for one reason. YOU.
"It's the most difficult work you will ever do. THE MOST DIFFICULT. But I can promise you friend, the peace and freedom you will find is priceless. Absolutely priceless. The man or woman you will become through this process is priceless.
"Keep going, friend. LOVE THEM and don't stop or give up until you do."
Since sharing his emotional post on Friday, it has gone viral with many people remarking on the power of Sean's message.
What an incredible post. We're sure this will inspire so many.
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