You will develop a routine and get reaquainted with each other's company so you won't mind movie nights in with your parents. However, watching a sex scene with them will still be the worst thing that you'll ever have to endure, ever. No matter how much you love your parents and spending time with them, the idea that you might start to stagnate is a particularly pressing one. Enjoy your time together because you'll (hopefully) be living by yourself again before you know it.
