There is an interesting tool on WikiTree. Under the "Find" icon a menu displays for "Relationships" and you place the wiki-id of both people in to see if there is a relationship. At this point there is not yet any relationship found.
Although these profiles aren't sourced, it is asserted that Sarah's father was Jonathan Tipton, The profile of Sarah's husband, Mordecai Tipton, shows his father to be William Tipton. William's profile shows him to be the brother, or perhaps half-brother of Jonathan Tipton Jr.. Jonathan and Jonathan Jr appear to be duplicate profiles and a merger might be in order. (Haven't sourced them, so can't say for sure.)
So it appears that Sarah and Mordecai were first cousins. This was not unusual in those days. I've found two other first-cousin marriages in the past few days while sourcing some unsourced profiles.
Yes, there's a whole bunch of duplicates need merging up.
The basic tree descends from Tipton-63
which already shows Sarah marrying her cousin. But the duplicate tree
doesn't make the connection because it has two of Sarah's father.