It's more than sex you've written. Love is introduced. Tender words are spoken both aloud and internally. In the climbing crescendo of passion, they make love and crash down in sated bliss.
Enter the children.
It can be difficult to find ways to rebuild fictional romance after kids are introduced. Learn how to put romance back at the top of the priority list.
Sometimes one or both of your characters have children. Those of us with kids know that having kids will turn our lives upside down. We can't fully grasp that concept until said kids actually arrive.
Here's a few ideas on how to find romance and sex for main characters with children, before it becomes scarce.
Unlike the real world where many people mistakenly prioritize like this: kids, career, and then each other. We writers can create it right. Make the H/H realize their relationship is a top priority – which will not only benefit your story, but their fictional kids too.
If both main characters have careers, they need to make time for each other; just as they did for their professions. Little things like cooking a candlelit dinner for their partner will set the scene for a romantic night.
Never Take Each Other for Granted
Sounds like advice from a marriage counselor. And the psychology works for writing too. All couples fall into a rut and forget to appreciate each other. Think of the tension available just in that premise alone!
To bring it back around to romance, have one thank the other when he or she does something nice and grow their relationship stronger. I'll leave it up to your imagination of exactly how the thanking is carried out.
It's not just hitting the laundry basket that makes one hold appreciation for the other. (Although for me, personally, this is a big one around my house) The importance of sex is critical. It's both emotionally connective AND physically rewarding.
When one partner appreciates the efforts (*waggles eyebrows*) of the other…the written scene can be beautiful.
Nurturing the characters' romantic relationship with their partner(s) and making time for intimacy will create physically and emotionally fulfilled scenes that are credible.