im really stuck in a bored marriage after the kids. How can I do something naughty and bring back the spark with hubby

Before anything else, you need to feel good and look good, naturally with that dine everything else will fall in place. Right? Who else agrees with me? Make a date with him, surprise him with something special, perhaps even a nice and warm welcome when he returns. You will get used to it over time. Action speaks louder then words, initially it may seem silly. But he will realize it soon enough.