In tonight's "Married at First Sight" episode, the three couples will say goodbye to the honeymoon stage and will take the first steps in moving in together. All three couples have had rocky starts to their marriages, but given their unique setup, issues are bound to arise.

"They don't know who this person is. They don't know if this marriage is going to work. As they begin to get emotionally invested, its natural for fears to be heightened," according to the show's psychologist Dr. Joseph Cilona.

David and Ashley have been experiencing intimacy issues while Vanessa has had fears over Tres' commitment to their marriage. Sam and Neil have been fighting due to lack of common interests and different personalities. Despite these issues, all couples have agreed to become friends and have made solid steps in establishing their relationships.

"Married at First Sight" has released video diaries wherein the couples are reflect on their experiences and issues just a few days into their marriages.

According to David, "It's been a challenge. It literally goes hour by hour. One hour... 'oh no, what's going on, she's not feeling this, she hates this.' The next hour I'm thinking, 'you know this is totally right.'"

Ashley notices David's efforts but is still feeling a bit uncomfortable with the situation. In the upcoming episode, the two will have to move in together but Ashley seems unimpressed by David's apartment.

In her own confessional video, Vanessa is slowly getting over her fears after having a heartfelt conversation with Tres. Instead on focusing on her fears, Vanessa is determined to just look at the positive aspects of their marriage. Based on the promo image of the upcoming episode, it seems that things are going well for Tres and Vanessa as they are seen sharing a sweet kiss.

On the other hand, the relationship between Sam and Neil is still bogged down with communication issues. The two spent their honeymoon fighting and Sam was even seen walking away. Now that they will have to move in together, how will the couple fare living under the same roof?

In Sam and Neil's video diary, Sam knows that the fight was her fault and that she will need to work on communicating better with Neil. While Sam and Neil have spent the past few episodes fighting, it seems that they will start getting along once they spend more time together. In the upcoming episode, the two are seen having fun and taking a selfie after spending time together in the mountains.

Season 3 of "Married at First Sight" airs every Tuesday at 9 p.m. ET on FYI.