The woman, named as Gönül S, 49, told prosecutors in the central Isparta region after her arrest that she had recently married her husband, 67, because he promised a happy life together.
"For the first 20 days everything was fine. But then the violence started," she was quoted as telling prosecutors in her testimony.
"He watched German porn films until the morning and wanted me to act out the scenes that he saw. When I refused, he beat me," she added.
More violence followed when she complained to police and during another argument her son, from another marriage, struck the husband with a blunt object.
She told prosecutors she then killed him by slitting his throat with a black-handled kitchen knife before giving herself up to the police.
Gönül S has been remanded on custody pending trial.
Some 163,573 people (118,014 women, 29,419 men and 16,140 children) were victims of domestic violence in 2014 in Turkey, marking a 33 percent increase compared to the previous year.
This increase is partially, however, attributed to the legal reforms undertaken in the recent years as well as to increasing media attention which has brought the scale of violence into a more visible level. Some 30 months after the Article 6284 on Family Protection and Prevention of Violence Against Women went into effect, for example, domestic violence applications went up by 75 percent, compared to the 30 months before the forementioned article.