OP here.
The kids (triplets) did tell and their mother confronted me. She wouldn't let me explain what happened just started yelling at me for cursing at her kids. I yelled back and things got bad. I had to call the police on her
for grabbing me by the neck. I guess I was just trying to see if I should have expected this kind of reaction from the parents. Not the assault

but the "I don't care what my kids did, you are a horrible person for swearing at my kids" reaction.
OMG ... I guess that may explain why her own triplets were behaving like they were ... I hope she didn't hurt you ...
As far as your reaction with the kids, I'm sure that wasn't the first time the kids ever heard a curse word ... and quite frankly, IMO, I think their mother over-reacted to the entire situation ... instead of assaulting you, maybe she should have stepped back for a minute and thought about even thanking you for watching out and taking an interest in her kids before someone got hurt ... or at the very least, just allow you to explain your side of the story before flying off the handle ... or how about this, maybe, if she were watching her own kids herself, none of this would have happened at all and her sweet little angels wouldn't have been subjected to a "swear word" ...
A similar situation like this happened to me ... a few kids from the neighborhood, and others who weren't even from here, were roughhousing in front of my house ... they were playing in the middle of the street, not paying attention to oncoming cars, and also flipping over the handle bars of their bikes onto a grassy area on the curb ... it was an accident in the making, no doubt ... so thinking I was being a good neighbor, I asked the kids to stop before someone got hurt or even worse ... they totally ignored me ... so I walked away until I saw one of the boys nearly get hit by a car, which thank goodness, was going slow and had enough time to stop ... and then another boy flip over his bike handles and land on the base of his neck ... it just made me shiver, and at that point my maternal instincts kicked in and I told them, ok, that was enough and they had to go home ... well, wouldn't you know it, in about 5 minutes their mother walked up the street and reemed me out that "it wasn't any of my business because they were playing in the street and not on my property, blah blah blah" ... I basically just stood their dumbfounded ... then I told her exactly what her kids and the others were doing and that I was "sorry" for watching out for the well-being of her unsupervised children & their friends before something tragic happened and I assured her that I would never do it again ... at that point she calmed down (I guess her kids didn't tell her the whole truth) and she went home quietly ... but let me tell you, it sure makes one question whether it's even worth trying to be a good samaritan anymore now-a-days ... and that's sad

...
So in conclusion, OP, I think your heart was in the right place and the kids won't suffer any permanent damages from your potty mouth

... in the contrary, you may have just prevented one of those kids from suffering a physical injury ... and I sure hope that their mother didn't cause you any injury either ...
