Arias is on trial for murdering Alexander, whom she has admitted killing in a violent attack in June 2008 when she stabbed him 27 times, slashed his throat, and shot him in the back of the head. She could face the death penalty if convicted.
Arias, 32, claims she killed Alexander in self-defense, and her attorneys have used her time on the stand to try to paint a picture of Alexander as sex-obsessed and abusive, while portraying Arias as timid and mistreated.
They two dated for a year after they met at a business conference and began engaging in oral sex within a week of their first meeting, Arias said on the stand on Tuesday. Arias broke up with her live-in boyfriend of four years in order to date Alexander.
The relationship quickly evolved into an intense sexual affair in which Alexander would arrange for meetings and request oral and anal sex or "grinding," in which Alexander and Arias fooled around naked but did not have intercourse
"That's something a lot of Mormons do that they aren't suppose to. The Provo push," Arias said today.
The Mormon religion forbids premarital sex, but Alexander explained to Arias that they weren't breaking the Mormon law of chastity because they were not having vaginal intercourse.