Hidden under the heavy blankets, the sisters' hands roam, discovering new territories. The elder's fingers trail down the younger's spine, causing her to arch into the touch. The younger, emboldened, reaches up to cup her sister's breast, feeling the firmness through the thin fabric. Their breaths grow ragged as they continue to explore, their bodies pressing closer, their hearts pounding in sync. Suddenly, a floorboard creaks, and they freeze, their eyes wide with fear of discovery.