I love these three together. It's like he's saying, "But Mum, I might wee on the bed, and then you'll be sad...hang on, you what? A waterproof mat, eh?! Wicked! I'm a-weeing now, I'm right on it!!"
He did wee, I'm not making it up.
He seems to have sitting cracked now. Mad how quickly he's coming on.