The piece was written or at least published on the 17th September 1985, Jan.
Jeremy has said that he approached the paper to put his side of the story. This was because of the negative press that he was getting. It is unlikely in the extreme that he would attempt to sell pornographic pictures of his dead sister when the press and the Sun were already printing smear stories about him.
How convenient for Fielder and the Sun that Jeremy offered them porno pictures and how stupid would Jeremy have to be to imagine that reporters who had been smearing him would stop smearing him and instead buy some nude pictures of his dead sister off him.
It has no credibility or believability as a story and is almost certainly untrue.
Jeremy has said eh?

And yet just prior to the story appearing in the Sun, he had mentioned the pictures to Colin so not really convenient at all! It is NOT unlikely in the extreme, it is clearly true, that's just you desperately trying to get the faithful on-board.
What smear stories were printed about Jeremy? Where are these headlines because the only story I have heard of is the one about when he tried to sell porno pics of his dead sister - a story made all the more credible because Colin backs it up. You have zero chance of discrediting it!