My SIL giving me grief because my 13 month old is potty trained !!!!

Tell her to butt out of how you raise your child.

If she won't take care of your son the way you feel he should be cared for I would ask someone else to watch him or work out at home while he naps. I don't think there is anything wrong with early potty training.

If you take him to the potty, then YOU ARE TRAINED ! LOL. WHen he walks to the potty and pees all by himself without any suggestion or pointing him that way, he IS potty trained. Yup--YOU are trained. Sorry. Its my honest opinion.

Please don't be offended but if he isn't going on his own and HAS to be taken to use the toilet then no he isn't trained. Children aren't considered potty trained until they are going on their own, don't need to be remind (accept for the occasional accident because yes they are little kids and things do distract him). But if he is only using the toilet because you are taking him too it then I am siding with your sister and saying he is not fully potty trained.
YES it is good that you are doing this now, he will grasp it more quickly and maybe when he is two he will be fully potty trained, maybe sooner hard to say.
When you sister is baby sitting, if she only has him for an hour than ask her to take him to the toilet once or twice while she has him to keep on with your schedule. Let her know the last time you took him so she can keep him on track.

Id tell her to shove it! Congrats on the accomplishment I can hardly get my two year old to go lol

To me it is obvious that she isn't comfortable with making sure he is toileting every half hour. You could find a sitter that agrees with your method of elimination training, or leave the pull up.

I do agree with her that you are more trained than your child, but I think he might "get it" easier when he is older than traditional methods. I would give you more grief about tanning than how you "train" your child.

He's too young to understand. I have seen other mothers do this (train them too early) and they always revert back to a diaper. Who has time to take a child to the potty every 30 min anyway? Your SIL isn't mad bc you made this mistake. She did it right, when a child is ready and understands what they are doing and why.

I think she is right. If you have to take him every 1/2 hour than you are trained. Not him. I wouldn't want to do that either. I don't blame her. She can't "butt out" because you are asking her to do this for you.

No, you are trained. She may not have time to take him every 30 minutes. OR he may not go for her.

My son was 2.5 when he was trained in 4 days. Yes, I took him and had him try every 15 minutes and then every 30 and so on, but, by day 4, he went on his own without my helping at all. He KNEW he had to go and he pulled his own pants down and went on the potty. So, while yes, you do have an awesome start, you can't expect everyone to continue that route, nor at 13months can you expect him to go for her.