"chambre de ma soeur"
Seven sisters are "sept soeurs" in French.
la chambre de ma soeur
'sisters forever' is 'sœurs pour toujours' in French.
"Mes deux soeurs" is how you say "my two sisters" in French.
Sister is "soeur", pronounced 'sir'.
my twin sisters is mes soeurs jumelles
"Utility room" in French is "buanderie".
Pas de soeurs
You would say "je n'ai pas de soeurs" in French to express that you do not have sisters.
The cloak room or coat room is "le vestiaire" (masc.) in French.
The French word for "Cindy's room" is "Cindy chambre".