I think it's because we've just gotten back from visiting my parents...
Yesterday I was told for most of the bus ride that I was a naughty mummy since I wouldn't let DS play with my phone. The phone was a reward for good behaviour but DS had been acting up in town so no phone. Then at bedtime he told me I had made him sad and I should be nicer to him. I wasn't ready for this level of guilt tripping for a few more years!