New Bra, Who Dis?

As the days passed, Lisa, the stepdaughter, was blossoming into a stunning young lady, necessitating some fresh lingerie. Enter her kind stepmother, Cathy. She discreetly handed Lisa a stack of new bras to try on, respecting her need for privacy.
However, a minor wardrobe mishap exposed Lisa in one of the bras, sparking an unexpected desire in Cathy. Unable to resist, Cathy found herself watching in secrecy as Lisa modeled more bras. Lisa was not clueless to her stepmother's voyeuristic actions, deciding to tease and flaunt her body indecently.
This playful exchange quickly escalated into a passionate embrace, blurring the line between the two as they surrender to their lustful desires.