Better Than She Knows Herself

Seth Gamble has strong feelings for his stepsister, Eliza Ibarra, and desires to see her content. He apprehends that Eliza keeps a significant part of herself concealed from others, so he devises a strategy. He requests his recent intimate partner, Aila Donovan, to spend the night.
When Seth introduces Aila to Eliza, an instant chemistry ignites between the two. Seth is hopeful, noticing Eliza's fondness for Aila. The trio spends the evening bonding before retiring to their separate quarters.
In the dead of night, Seth wakes up to find his space deserted. Curious, he tiptoes to Eliza's room and spies on Aila and Eliza engaging in erotic activities. Mesmerized by the scene of mutual exploration, he gets caught snooping.
Seth confesses his ruse to Eliza, disclosing Aila's true identity as an acquaintance he hired to assist Eliza in embracing her authentic self. Understanding Eliza's struggles with her sexuality, Seth's only intention was to support her. Initially taken aback by this revelation, Eliza soon comprehends Seth's pure motives and reciprocates his feelings with affection.
When Aila jokingly suggests a threesome involving Seth, Eliza, swept up in the moment, agrees. Together, the three of them embark on a night of discovering boundaries and indulging in pleasure, navigating the uncharted waters of exploration with open hearts.