'Married at First Sight' season 4 spoilers: Heather wants to end marriage; Tom is not ready for kids

None of the experimental couples of "Married at First Sight" season 4 will be on the same page in today's episode, titled "To Have and to Hold."

The pair who has it worst is Derek and Heather, who are already considering ending their marriage. Both of them appear to be having trouble communicating with each other and talking it out in a proper manner.

In another teaser for "Married at First Sight" season 4, episode 8, Heather said that she could no longer bear the way her husband fights and his name-calling when they have disagreements.

Derek, on other hand, mocked Heather about her statement that she should not be dealing with this kind of issues at her age, which is 32. Heather has no idea what to do about this, but for now, they are getting the help they need in the form of discussions with experts.

It is unclear if they will try to work things out or if they are even willing to, but it looks like they are not doing well when fans check on them in the next "Married at First Sight" episode.

As for Tom and Lillian, the subject of having children had the couple butting heads. The two will be babysitting in "Married at First Sight" season 4, episode 7, which leads them to realize how very different their views are on the idea of starting a family.

"I fear that I'm really not cut out for kids," Tom said in the teaser, adding that he does know how to deal with the responsibilities and the problems that goes with being a parent.

Lillian, on the other hand, knows that Tom will be happy to have kids someday, but knows that it will be a struggle before they get there. "If he is not good with children, that would be very stressful," she admitted.

As for the final couple, "Married at First Sight" season 4, episode 7 will see Sonia attempt to get to know more about her husband Nick. In the teaser, he said that while she is "awesome," she is not in love with her.

Sonia walked out after hearing that. She confessed that Nick is "closed off" and this is posing a problem in their marriage. He appears to be uninterested in the relationship. What's next for the couples?

Find out on "Married at First Sight" season 4, episode 7 "To Have and to Hold" airing today, Sept. 6 at 8:30 p.m. ET on Lifetime.

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