The Last — Tawna Fenske

Sarah Keating was sure she'd be married by 30. Husband, kids, the kick-ass career helping adults with Down Syndrome -- she assumed she'd have it all, and there'd be no need to fall back on the marriage pact she made with her best pal from college.

But a tipsy message she sends from her birthday party brings Ian Nolan to her door ready to rock her world, and not just with mind-blowing sex. He's up for tying the knot, and has a million pragmatic reasons it makes perfectly good sense.

As Sarah and Ian test drive their marriage-of-convenience, they navigate awkward business dinners, a slippery steam room hookup, and a costume party gone awry. Their friendship is stronger than ever, and the sexual chemistry is off the charts.

But is that enough to make a marriage work, or will one of them fall hard and end up brokenhearted?