You can seat Mrs Jones in any of $8$ places. Once she’s seated, there are $3$ places that are not available to Mr Jones: the place where she’s seated, and the two adjacent places. Thus, there are $5$ choices for his seat. That leaves $6$ people who can fill the remaining $6$ seats in any of $6!$ possible orders, for a total of $8\cdot5\cdot6!=28,800$ possible arrangements if the seats are the table are individually identified.
If we care only about who sits next to whom, then we don’t care which of the $8$ seats Mrs Jones takes: all we care about is where the others sit in relation to her. That reduces the number of choices to $5\cdot6!=3600$ and must therefore be the intended interpretation.