In terms of what my wife and I do, we are currently not doing a devotional but rather a podcast. I would highly recommend MarriageToday with Jimmy Evans if you're looking for something more marriage focused.
We've had a number of threads asking a similar thing at /r/ChristianMarriage. Here's a few to dig into if you're looking for more ideas. Lots of good stuff out there.
In the past, my wife and I have enjoyed Daily in Christ (can read it free on Crosswalk) and Who I am in Christ by Neil Anderson.
In terms of what my wife and I do, we are currently not doing a devotional but rather a podcast. I would highly recommend MarriageToday with Jimmy Evans if you're looking for something more marriage focused.
https://itunes.apple.com/us/podcast/marriagetoday-audio-podcast/id209659095?mt=2
We've had a number of threads asking a similar thing at /r/ChristianMarriage. Here's a few to dig into if you're looking for more ideas. Lots of good stuff out there.
https://www.reddit.com/r/Christianmarriage/comments/a0qnqb/looking_for_suggestions_on_devotions_i_can_do/
https://www.reddit.com/r/Christianmarriage/comments/9st5yf/devotional_and_bible_studies/
https://www.reddit.com/r/Christianmarriage/comments/9wb6q4/personal_devotional_time_advise_for_newlyweds/