Who said anything about sexuality? This is about the way little kids think about romantic relationships – “being in love” and “getting married”. If she’s already talking about people falling in love or getting married, and her Aunt Toni did get married so she certainly is aware of romantic relationships, she might think boys can only love girls and vice versa.
It’s totally reasonable to explain that boys can love and marry boys and girls can love and marry girls, purely in the six-year-old context and framework of “love” and “married” (where that means like having a house together and having kids and pets, or whatever). What is more inappropriate about that than what she already knows about people falling in love and getting married?
If she is old enough for any conception of “falling in love” or “getting married”, then that’s old enough for the conversation. There’s literally nothing more to know – “Boys can fall in love with girls and marry girls, and some boys also fall in love with boys and marry them and some girls also fall in love with girls and marry them!”
Folks – it’s called “comic book time”. Alternately, a “floating timeline”. You can look them up on TV Tropes and Wikipedia, respectively. As the author of one webcomic put it, “This [comic] is not gradually going to become a period piece.” If you don’t want that to happen, this is how comics have to work!
The Sesame Street scene depicted is actually a specific, real one from Sesame Street! It’s this one with Kermit and Cookie Monster and a mystery box: https://www.youtube.com/watch?v=shbgRyColvE
Who said anything about sexuality? This is about the way little kids think about romantic relationships – “being in love” and “getting married”. If she’s already talking about people falling in love or getting married, and her Aunt Toni did get married so she certainly is aware of romantic relationships, she might think boys can only love girls and vice versa.
It’s totally reasonable to explain that boys can love and marry boys and girls can love and marry girls, purely in the six-year-old context and framework of “love” and “married” (where that means like having a house together and having kids and pets, or whatever). What is more inappropriate about that than what she already knows about people falling in love and getting married?