Here are some English sentences to describe sisters being happy together:

1. "They laughed and danced, their joy infectious, as sisters made for each other."

2. "In their shared laughter and joyful embraces, the found solace and happiness."

. "Their smiles intertwined like a tapestry, radiating pure happiness as sisters always do."

4. "Hand in hand, they skipped through life's challenges, their bond as sisters unbreakable."

5. "With every giggle and every secret shared, their sisterhood blossomed brighter, their happiness amplified."

6. "Their laughter echoed through the air, a testament to the lifelong bond of sisters, forever joyful."

7. "In the embrace of sisterhood, they found a happiness that knew no bounds, brighter than the sun."

8. "Side by side, laughter spilling from their hearts, their sisterly bond filled their lives with endless joy."

These sentences capture the joy and happiness that comes from the bond between sisters. They highlight the shared laughter, unbreakable bond, and the special moments that bring them joy.