This is going to sound completely odd to some people. But it depends a lot on how the day goes. Some wedding days are incredibly stressful, long, exhausting events and many are then followed by receptions that last forever and are almost just as high-tension. You think that rough 8 hour day at work can exhaust you? Imagine being part of an event where one, usually multiple people all have an image of "this perfect day that is going to go exactly how I envision it". Could be the bride, could be her mom (trying to have a do-over for her wedding), could be a pushy sister, or some combination of that. The events, especially if they are major productions that are then micromanaged by the various 'zillas? Well, at the end of a long day like that? You're beat. As far as first time being intimate? Neither person should make any assumptions, especially about or for the other. Talk, talk lots, talk softly, talk lovingly, and talk about everything. How nervous you are, how much you care for each other, ask questions, how does this feel, do you like it, etc. Since you are both inexperienced, there shouldn't be any expectation for the other to "automatically know stuff" and that discussion, that taking of your time, that gentle exploration.... is a good way to unwind after one of the most stressful events you've both recently been through. My wedding night? It was fine. Not awesome, but very very nice. We laughed, we talked, we loved. It's all good.