They were in love...at least when they were still dating and when they married each other. Now, two years later, The answer is 'its complicated'

They go home in the same house, yes, but they don't sleep on the same bed. Barely talk. Pure work. No affections anymore. No more sweet moments or intimacy. Nothing. Even at work, they only talk when it's necessary

What happened? Not sure. When did it all start to fall apart? Uncertain either. Do they still love each other? Not sure. But the answer to that question dawned to Simon, the Lieutenant of the Task Force 141 when he saw her at the base chatting with Soap. Something was triggered in him.