@Ocd_is_horribke - This statement that "people don't act on their intrusive thoughts/urges" is actually false.
People don't act on their BIG intrusive thoughts and urges. For example, if we had an urge to take a knife and kill our best friend, we would not act on that, of course.
But if we have a urge to do something tiny (like squeeze the knife too hard in the moment), then we CANT STOP OURSELVES from that.
Let me give you some examples. I have had a fear of raising my middle finger higher than the other fingers (because I am afraid of offending God). Now, if I have an urge to raise up my middle finger to the sky and tell God that I think he is horrible for five minutes, then I can prevent myself from doing that. But if I have the urge for my middle finger to twitch slightly higher than the others in the moment, then I really can't stop myself.
A person on the app with POCD once wrote how he couldn't prevent himself from moving his hips slightly when he felt false attraction. And I told him to stop worrying about it. He can't really prevent that.
But he could and would prevent himself from actually assaulting a random person on the street.
So, here's the scoop. We don't have to prevent those little things because THEY DON'T MEAN ANYTHING ANYWAY. In my case, if my middle finger slightly raises up, that actually is not offensive to anyone. And if the guy on the app moves his body slightly, it doesn't actually matter. And in your case, the child on your knee was not actually harmed. In reality, nothing has really happened.
So, now, let's talk about what to do when those urges come up...
We need to handle them the ERP. We need to treat these "intrusive urges" exactly the same way we treat "intrusive thoughts."
This means that when the intrusive urge comes, we assign no meaning to it. If you end up doing the urge, then who cares? It doesn't matter. And we need to practice just chalking it all up to OCD and moving on with our lives.
If I stayed afraid of moving my middle finger, I would be paralyzed in life. But I have told myself that if my middle finger twitches higher than the others, then that's fine. It's just OCD, and I can't worry about it. I allow it to twitch if it wants to, and then I practice going about my life.
This can be very scary. Our OCD fears feel real, even though they are not real. In fact, every time we practice ERP, it can be very scary. But the more we practice, the easier it gets. We have to keep practicing moving on with life and assigning ZERO meaning to the urges, even when we "give in" to them. In reality, they are just OCD and don't mean anything at all.