Terisa, 41, is at the center of this particular polyamorous cluster. A filmmaker and actress, she is well-spoken, slender and attractive, with dark, shoulder-length hair, porcelain skin””and a powerful need for attention. Twelve years ago, she started dating Scott, a writer and classical-album merchant. A couple years later, Scott introduced her to Larry, a software developer at Microsoft, and the two quickly fell in love, with Scott’s assent. The three have been living together for a decade now, but continue to date others casually on the side. Recently, Terisa decided to add Matt, a London transplant to Seattle, to the mix. Matt’s wife, Vera, was OK with that; soon, she was dating Terisa’s husband, Larry. If Scott starts feeling neglected, he can call the woman he’s been dating casually on the side. Everyone in this group is heterosexual, and they insist they never sleep with more than one person at a time…..