we have cousins on a sleepover all children aged 8 -12. All ifs went off for walk on our property. Th bught walkie talkies. I was trying to get another set up as there wasn’t enough to go around and I overheard b snippets of what my daughter and her cousin aged 11 and 12 were saying ( not to each other). They didn’t realise I could hear. He was using the language fcking cnt and my daughter was drawling on f*cking hell etc and I’m pretty such she was moaning and making sex noises. I know this is a thing in their primary school. As my younger sons have asked me why does so and so go and they imitate moaning/panting noises. What do I do here? I’m so shocked. Her cousin is perfectly behaved in front of me.