I wouldn't worry. Thanks to the proliferation of leftie indoctrination in schools, by ten years old most of them not only know what homosexuality is, but many have also "come out".
Homosexuality is legal and most people don't care either way, but some religious extremists want all LGBT murdered. The situation here is pretty much "Don't mention it and is well" but gay rights activists do mention it and do end up in trouble.
There was one openly gay teacher at my last place and I know two at my daughter's school are gay, but everyone simply ignores it as they're perfectly good teachers and their private life is theirs.
However, most younger kids here are unaware of homosexuality (Those including my daughter) and I have no wish she find out much about sex of any sort just at the moment.
That makes this a deal killer as far as the film goes - but I might very well still watch it if I get the chance.