Ian Paisley has said a £200 payment that he received from a religious publication to write a platform piece praising pro-life Catholics is a "standard fee".
The article, which appeared online last month, revealed the DUP MP's admiration that Catholics who take the stance are not "embarrassed" to stand up for their views on the controversial issue.
The payment was logged on the House of Commons' Register of Members' Financial Interests, which provides information about any financial interest a Member has, or any benefit they receive.
In the latest register, Mr Paisley also declares that in July 2019 he received two tickets for British Grand Prix at Silverstone, and associated hospitality, with the value of £1,220.
Mr Paisley's article appeared in the Catholic Herald in July.
On the £200 fee, he told the Belfast Telegraph: "It's a standard fee. I write articles. I've been a columnist for The Sun, columnist for the Daily Mirror."
Previous register entries, dating back to 2014, revealed Mr Paisley was paid between £200 and £400 for a number of articles he had written for The Sun.
He added: "I write articles from time to time. I think even the Belfast Telegraph have paid me for articles. The Catholic Herald is a newspaper, they pay a fee to anyone who contributes to it."
In the Catholic Herald article, the North Antrim MP explained that his admiration of Catholics stems from the fact they are "unashamed" about the fact the Christian denomination "promotes devotion and values family, children and life".
He also admitted his comments may raise eyebrows coming from the son of the late Ian Paisley, one of the founders of the DUP.
However, despite public perceptions of his father, Mr Paisley says that his upbringing as the son of a pastor meant that "people of all backgrounds, all faiths and none" were welcomed into the family home.
"Very often, it was a Roman Catholic visitor who wanted a prayer said for them and their situation," he continues.
In the article, he also stresses that he shares "identical beliefs" to pro-life Catholics.
"What strikes me most is that they are unashamed and are never embarrassed about having a faith that promotes devotion and values family, children and life," he writes.
"These values are identical to my own beliefs. Whilst my faith may not require me to light a candle for a bereaved loved one or friend, I wouldn't dismiss lightly that kind of public display or token of concern and thought. Even Christians can sometimes be too stiff-upper-lipped to express emotion."
He also described himself as a "long-time campaigner for the protection of the rights of the unborn".
Mr Paisley said it was "without doubt" the strongest support he has received - both publicly and privately - has been from his Catholic constituents.
"They are quite happy to tell me that they disagree with many aspects of my politics," he admits.
"But they say that's easily put aside when they know I'm fighting faithfully on this matter. To hear them say this - either privately in whispers or more publicly - brings a wave of real encouragement and a sense that I am doing the right thing."
He revealed that within his own constituency he had received support from Catholics for his stance on the abortion issue.
"Just in the last six months, I've received over 800 letters and emails from constituents who are Roman Catholic offering support on this one issue. That cannot be overvalued," he wrote.
The MP added that he also has the support of anti-abortion campaigner Bernie Smyth, from Precious Life.
He revealed that he was "left moved" when she signed his Westminster nomination papers on the "basis of my pro-life credentials", adding the gesture was more meaningful as she was "publicly happy to nail her colours to the mast".