According to the Herald Sun, the 21-year-old son of Australian rugby league legend Wally Lewis is understood to have filmed the sexual encounter on his mobile phone last year with an 18-year-old Australian TV star, before showing it to fellow Home and Away cast members and crew.
"You do stupid things when you are young," Lewis told the Australian media today. "But you learn from your mistakes, that's part of growing up. This mistake, and what I have learnt, will contribute a lot to making me a better person in the future."
Channel Seven, the network which produces and screens Home and Away in Australia, is taking the matter seriously and has disciplined the actor, urging him to undergo counselling.
"As soon as Channel Seven was made aware of these allegations we needed to urgently clarify fact from fiction," Channel Seven programming director Tim Worner said. "Lincoln is a young man of tremendous character. He acknowledges and can accept and take responsibility when he has made a mistake and regrets the event which transpired over a year ago."
Earlier today, Lewis's mother Jacqui appeared on Australian radio station Nova and verbally attacked her son's accomplice in the scandalous film clip.
"I am glad he is not with that girl any more, I don't want that as a daughter-in-law," Ms Lewis said. "She must have said she was willing to do it. It takes two to tango, doesn't it?
"As a female, I wouldn't be doing any of that - we keep things. Have a look at Monica Lewinsky with Bill Clinton - she kept the dress.
"It's on his phone but she allowed it."
Lewis, who won a Logie award last year for best new male talent, was yesterday announced as one of the cast members for the new series of the Australian version of Dancing with the Stars.