It's decision day, and emotions run high; the couples must decide whether to tie the knot or call it quits forever; couples who honor their pacts get married in the beautiful streets of Cartagena.

The house is a pressure cooker as decision day draws near; Shan has a heartwarming treat in store with surprise visits from loved ones; after time with family and friends, the couples are separated the night before decision day.

The couples are challenged with temptation; they head out for a night on the town without their better halves; Marcus sneaks off for a secret chat with Alysha; the women are whisked away for some wedding-dress shopping.

Decision day is just around the corner; with the tension mounting, thecouples could use a pick-me-up; Shan saves the day with two exciting activities, ring-shopping and tantra; these experiences are all about bringing the couples closer together.

The couples take part in an exercise designed to test trust and communication; as the couples become more vulnerable with each other, things heat up for some, but cracks start showing for others.

The couples navigate the tricky world of finances; Logan and Trevor hit their first bump in the road; Dennis uncovers one of Mary Ann's deepest fears; Armani's patience is tested; Quentin works at winning over Alysha.

It's time for our six duos to kick off their first challenge; relationship guru Shan Boodram has a special treat in store for them; Shan has planned unique dates for each couple that are specially designed to ignite physical chemistry.

Six duos arrive in Cartagena, Colombia, and dive headfirst into a 21-day journey to test their marriage pacts from the past; it's a dating experiment like no other, as the singles live under one roof and share a bed with their pact partners.