Dumb shit like this makes me wish I could make a series. Tease that two girls are in love with each other by being close and affectionate, and then at the very end of the series reveal they were just family. I want to hear the anguish that they shipped incest for 10 years because I'd drag that shit on, making them separate for awhile before half-way into the series starting to interact on screen more despite the fact they're family and live together since the beginning. Just have the fucking series finale wham line be "thanks sis, by the way mom says be back by 10 and don't stay out too late with your boyfriend."
God I just have the urge. I have thought about this so many fucking times in the past few years. It's nearing to be just as on par with simply wanting to make a passion project animated series as motivation.