Is OTHER wrong in the post ? POST : For reference, my sister is 29,, I'm 25M, and my nephew is 7M. 

So, growing up, my sister, let's call her Caroline, grew up with two extroverted, high achieving parents. And they wanted us to be just like them, putting us into sports, instrument lessons, reading groups, martial arts, etc. Personally, I enjoyed that busy lifestyle. But it wasn't for Caroline. She didn't like being busy, she doesn't like interacting with people, etc. She's super shy. It took a while for my parents to understand and accept that she wasn't the type. But when she had her son, let's call him Kainen, she told me she didn't want to put him in activities because she didn't want him to suffer. I pointed out some kids enjoy activities/sports/are extroverts, like me, and some people are introverts and don't like activities, like her. So she should put him in some stuff, see if he enjoys it, and act accordingly. She kind of brushed me off.

In the years since then, it's become kind of an issue between the two of us. Kainen doesn't play any sports, isn't playing any instruments, and since he was never exposed to other kids before school started, he has trouble making friends. I talk to him regularly about this, and he always says he wants friends, wants to play baseball and do swimming, and that he asks his mom but she doesn't let him.

So over the years I've really confronted her about this, but she just calls me out for 'undermining her parenting'. I just want Kainen to, y'know, be involved in activities and make friends. 

Aita?