[F4M] Secretly Dating Your Best Friend's Bossy Younger Sister [EARLY] (Patreon)

You and your best friend's little sister have been seeing each other secretly for a few months now. You started right under his nose, despite the sister having some restraint about it at first. She really likes you, though, and decided to go through with it anyways- even if it makes her brother angry in the grand scheme of it. It started off very exciting, but now your girlfriend is ready to make it OFFICIAL official, urging you to break the news to her brother one of these days. You promise her you'll do it, and she promises to never bother you about it until then. The two of you kiss and forget about the looming threat that could end your relationship.