Every once in a while (more or less and certainly depending on the person) mom's need, you know, "grown up time." And, every once in a while, things will get noisy because, hello: this is sex we're talking about. That means, however, that every once in a while a kid will hear that noise. While every mother is different (and hopefully sex positive) there are more than a few tried-and-true thoughts that go through every mom's head when she realizes her kid can hear her having sex. Usually, those thoughts resemble something along the lines of panic.
When I've been enjoying an (definitely earned) orgasm, only to realize my children can hear me, I've come pretty close to freaking out. One knock of the headboard into the wall, one squeaky bed spring, or one stray vocalization is enough to wake my kid up. Light sleepers are the worst. So everything, and I mean everything, stops cold until my partner and I are certain our son isn't walking down the hall to investigate. Once we're sure the coast is clear, it's the possibility of my kid walking in on us is still there, in the back of my mind, just waiting for that door to open, just waiting to hear someone say "mama."
You could be the most sex-positive person on the planet, but I would say that nobody really wants their children walking in on them when they're having sex. I mean, that's just not a situation you look forward to talking your way through. It happens though. It happens to everyone, I'm pretty sure. So at least we can offer off nods of solidarity to one another, right?