In just one week three couples have married as strangers, honeymooned and moved in together. It's Father's Day weekend, so it's the perfect time for the couple's to spend time with their in-laws. Sociologist, Dr. Pepper Schwartz, visits each couple and helps them adjust to married life. Intimacy develops between Tres and Vanessa; Neil bonds with Samantha's dad. Ashley supports David as Father's Day brings back memories of losing his Dad.