Nope. Trump is behind it. National enquirer does his bidding.
If you read the story, you know that it was offered to many main stream publications. Also offered to Breitbart News.
As far as Trump being involved, I disagree. The timing is not particularly good for his campaign given the upcoming contests. An adultery angle would have been much better prior to Utah, not after, expecially when the upcoming east primaries make Kasich viable.
Objectively speaking, better to taint both candidates to make it better for Kasich.
There is video too.
I have a feeling Teddy got into this bind all by himself. :-)