<human>: Summarize the given text in a few sentences.

So basically I came out to my family about 4 years ago, when I started dating my then girlfriend. I introduced her and my entire family loved her, even if they were hesitant about the gay thing. They came to our wedding and have been generally supportive. Although they seem more comfortable ignoring the fact that we are in a romantic relationship.

I feel like the treat her like family, but it is especially true with my nephew. He adores me and my wife. At family gatherings, he pretty much goes straight to us to hang out. He often comes over to spend the night. We go out to dinner. We go to his sporting games. You get the idea. We are close. 

I felt like we had a chance with his generation of kids to introduce the gay thing as not that big of a deal. Seems simple to just say to him, "Some boys marry boys, some girls marry girls, and some boys marry girls. As you get older you will get to pick which one..." Or something along those lines. Well apparently my nephew finally asked my sister what was up with my wife and I. He said "Hey mom I was wondering... are [aunt] and [wife] sisters like you guys are sisters or are they just friends that live together?" 

She told him "Yep, they are just friends that live together..."

It really bothers me. She seems to think that he will have an issue with it (?!?!) but I think it is clearly her that has the issue with it. He loves us. If she told him we were lepers he would probably think lepers were awesome. 

I feel offended and like they are saying that we are weird or different, or like there is something wrong with us. I don't want that stigma passed down to my nephew. 

What do I do? Tell my nephew the truth? My sister can be a really big bully... so I am slightly scared to question her parenting or how she wants to approach the topic with her son. It just makes me sad.
<bot>: My sister told my nephew that my wife and I are "just friends". It hurts my feels and creates a negative view on gay people in general that I really don't want passed down to my nephew.