Is it wrong to be this close to my sister?

we like to sing and dance together. and it feels like people are judging us because don't have many boundaries, and we sleep together, bathe together, and spend a lot of time together. we also sing love songs and dance in ways most people find suggestive or disturbing. but we don't think of it as ual or anything, and don't feel awkward. i won't lie though, we used to practice kissing when we were younger, but it was never because we liked each other in that way. as long we're platonic, and are just having fun, is it wrong for us to be so care-free about what we do together?