We have a new DD aged 8wks, DS aged 2.10 has been potty trained almost totally reliably since August but all of a sudden this week he's having accident after accident. It's not that he's not making it to the toilet in time, he's simply saying nothing and doing it in his pants! I realise it might be attention seeking with new sister but have no idea how to deal with it. Today we came out with 4 spare pairs of bottoms and we're down to the last one. Help!!