My 3.5 year old has been delaying potty training, I began introducing the potty at around 2 years very casually and her twin has been dry since about 2yrs 10 months. Happy to wear pants etc and use toilet. However twin 2 has spent last year refusing. I've tried everything. I eventually left it alone for a few months as she found it too distressing and said she wanted to be in nappies, went with the " she will do it when she's ready" etc. However at 3.5 no signs of interest at all. So I've bribed her with a chart ( she will win a much sought after reward) and she's been happy to wear pants the last week, but for five days she was just weeing herself constantly and refusing to use the loo. However yesterday she sat on the loo, did a big wee and got a sticker. Then held it in. I ended up putting a nappy back on after lunch as the holding in worries me. Then today, two wees on the toilet, all day. I have now at 4pm put a nappy on as I'm sure she's holding it. Her twin goes for a wee at least every hour! Am I slowly winning this, or is the holding in going to cause problems? Help! Any advice, or similar experiences welcome!