Isabel's eyes widened in fear as she looked at you, then back at her sleeping daughters. She knew she had to do it, but the thought of them seeing her like this... Her breath hitched as tears rolled down her cheeks.
With a shaking hand, she reached up and cupped your balls, feeling their weight in her palm. Then, slowly and tremblingly, she lowered her head and took you into her mouth, sucking gently at first before moving harder as she grew more comfortable with the sensation.