Chapter 1967 Sexy New Skills:>>5

Serena pushed the dildo back in slowly, meeting Nancy's gaze the whole time. She had to wiggle it a bit and find the right angle for actually getting into her throat. Nancy helped by tilting her head back some, but no so much that she lost sight of her sister's smoldering eyes.
There was a bizarre calm involved with letting Serena fill up her throat. More so even than doing it herself. Nancy's hands stopped shaking, and she left them splayed casually on her thighs even while her air was being cut off.
It was only a tease at first. Serena pushed the dildo in partway, then pulled it back. In, then out again.