I'm not entirely sure specifically about 'boots and chaps' in Myla Jackson's MFM romance novels. However, Myla Jackson usually weaves great stories. You might want to check out book review websites or forums dedicated to romance novels. There, you can find out if her novels with this theme are worth reading. They might have details about the plot, characters, and how well the cowboy or western elements are incorporated.
The MFM aspect makes it special as it offers a different take on romance relationships. The 'boots and chaps' gives a western touch which is not common in all romance novels.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.
Well, it's hard to say for sure. The concept of 'porn-like' is quite subjective. Some might consider certain novels with excessive sexual descriptions as such, but it depends on individual perspectives and cultural standards.
In many places, 18+ porn comics are considered illegal. This is because they can have a negative impact on society and violate moral and legal standards.