Spousal abuse is far more common that most of us realize. Actually, abuse is common in most marriages; perhaps that is why 50% of marriages end in divorce, 67% of second marriages end in divorse, and 75% of third marriages end in divorce. It is why marriage couselling is so common!
All to often courting leads to both people being on their best behavior and unless the courting period is sufficiently long, neither person knows the other that well. Until we're authentic ourselves it is very challenging to live in a comfortable relationship with another person.
The solution for spousal abuse is to work on ourselves first through a variety of therapies that range from psychotherapy to bodywork and then work on the relationship. All to often neither person in a dysfunctional relationship is capable of being a healthy partner. Frustration leads to fighting back, and sometimes the approach that is taken can lead to very sad scenarios.