im sorry not sure if this helps but when my DS told me he needed to do a poo (in the potty first time) after two long days with a bare bum ... i just ignored him i mean it didnt say a thing and looked away i think he may have been embarrassed about me watching him / talikng him / trying to read to him while he was on the potty before
anyway he jumped up when he was finnished and asked me to come and look he was so proud i guess we all do it in our own time but best of luck with it