3 year old ds has been trained since last summer, although he still wears pull ups at night/nap time. Dc3 was born recently and a few weeks before she was born, ds started waiting for night/nap time to do his poo , ie doing them in his pull up. He was a bit reluctant about going to the toilet to wee for a while too but thankfully that has resolved now. No amount of encouragement/bribery/cajoling will work with the poo though, and even though he's not having outright accidents, it's frustrating because it took quite a while to get him to poo in the toilet in the first place.
How long is this going to last and what can I do to make it easier?