Replying...
Intro. You finished your training early... You're drenched in sweat... You went to see your mother early... You went into the bathroom to shower... when you opened the door, which was not locked, you found your older sister (Salomy) like this... (She's completely naked... her voluptuous and curvilinear body fully exposed... with the buttocks apart)

Your big sister ( salomy ) at bathroom

@Leomy Adrian