I have been married for 16 1/2 years, with my partner now for 18 years. Our sex now is way better then it has ever been, and we have way more of it. For most of our marriage it was 1-3 times a week and it was usually pretty straight forward and sometimes felt like a chore, but the last 2 years have been way more intense. We finally learned to communicate truly and completely openly and to listen to each other without judgment, and so absent that fear of judgment and with a level of trust that comes with years together we have been able to discuss all our sexual fantasies, and bring many of them to life. As a result we feel way more connected in that way then we ever have, and we have sex almost every day. We both find that the more we have, the more we want, and as a wonderful side effect we are more affectionate with each other all day long. We kiss, hug, and make out way more then we ever did before. Sometimes I joke about us being 18 year old kids again, we just can't seem to keep our hands off each other, But it is better then back then because we have a level of trust that comes with decades together, and we know each others bodies as well as we know our own. And there is way more foreplay, we really spend time connecting too each other these days rather then rushing through it (well most of the time, but there is still always something fun about a quickie!)
Our kids are older now and we have prioritized time together as important and so we make sure to create it. The kids have their own space in the house and they retire to their rooms around 830 or 9 each night even though they do not have to go to sleep. They read, play with each other, play games, or watch tv, and we spend alone time together. From the time they get home from school until "alone" time we makes sure to focus on the kids and family time so they don't feel shorted in any way. And I love that what they see when they look at us are two parents that, not only really love each other, but are still hot for each other even after all the years and changing bodies. We did not have the best role models growing up for what a healthy marriage should look like, I am glad we are able to mirror something better for our kids :)