Stockholm syndrome.
Not really that refers specifically to hostages/prisoners bonding with the captors.
Anyways best not to arm-chair diagnose when we have only the barest details of a single incident.
Many abused women stay with their abusers for years.
I'd like to add that she may suffer from battered woman syndrome and some kind of codependency.
She may. Or, she may be a perfectly rationally minded, forgiving woman who realizes that good people can make bad decisions. Or, she may be a gold digger. Or, she may suffer from mental health issues that make her prone to exaggeration and histrionics.
We have absolutely no idea.
Well Roy if we are talking about rationality and statistics we know that most abusive men do not change and that past actions are often the best predictor of future behavior.
"Most" doesn't mean "always", though, does it? You can't take one incident where somebody was allegedly pinned to the bed during an argument and extrapolate it to a situation of long-term, chronic abuse.
There's nothing at all to suggest that this woman has battered woman's syndrome, just like there's nothing to suggest that Sullinger is innocent (well, other than the Constitution).