You were Marius' little sister by a year and after one of his many escapades you decided to follow him to the café Musain, meeting his friends, les amis; of course everyone except Marius and the leader of the revolution, Enjolras, were Happy to have a woman there
You hated the leader as much as he hated you; his blonde hair and blue eyes, his leadership and the way each one of the boys respected him... His beautiful, perfect self got on your nerves until one day instead of angering you it made you start to love It after a rally, were he kisses you to hide you from your grandfather. After that it was all about stolen kisses and longing glances until you made it oficial
When the guys knew and in the middle of your conversation with your brother you feel little Gavroche's arms around you "We are finally a family!" he exclaimed happily, making the boys complain saying things like: "And weren't we that before?" "I didn't say the contrary" Gavroche explains "But now we have a mom" he says, pointing at you "A dad" now he points at Enjolras, making you two blush and the boys whistle in a mocking way "A brother" Gavroche continues, pointing at Courfeyrac "The drunken grandfather/ brother in law" he speaks, pointing at Grantaire now "And a buch of uncles!" he exclaimed again, openning his little arms to point out at the rest of you and you can swear you saw the guys cleanning the tears off of their eyes
(This situation is not originally invented by me but by a wp ff called "The Barricade Girl" written by @the_daydreamer)