Yonni Barrios, who was the 21st miner out of 33 to be rescued last week, was welcomed on the surface by his mistress, Susana Valenzuela, after his wife of 28 years, Marta Salinas, refused to greet him.
But Ms Valenzuela claimed her 50-year-old boyfriend was also seeing a 25-year-old woman, Rosa Esther, who tried to visit him at the hospital. He was taken there for treatment after spending 69 days trapped underground.
Cheating miner Yonni Barrios. Photo: APMs Valenzuela stopped the young woman from seeing him, telling a Colombia radio station La FM that "he is my Yonny Barrios, mine and no one else's," the New York Daily News reported.
"How on earth is another woman going to take your man away from you if you're in love with him? I hit her, I hit her a lot."
Both Valenzuela and Salinas organised welcome home celebrations for Mr Barrios, roasting meat and inviting neighbours over for the parties, London's Daily Telegraph reported.
Outside Ms Valenzuela's home, she posted some handwritten signs, including "That miner is mine (watch out)" and "I love my Tarzan. Welcome to your home with your Jane."
The 52-year-old mistress spoke in detail to La FM about Mr Barrios's virility, saying they made love on the second night he was in hospital, after their first attempt the day before was thwarted by nurses.
"The following night we did everything. They said he was weak but he was as strong as an ox. I felt like I was in heaven," she said.
"I love Yonni and he loves me and we're going to be together till we die.*
"No one and nothing, not even the biggest piece of gold in the world, can break our bond."
Editor: *Im sure thats what he told his 1st wife too. Ha!