Sex mommy!

You sit up in your bed while she begins to deep throat your massive tool. Looking at her face you can tell she doesn't care about anything other than your cock.

"Good mommy you're a nice cock sucker you whisper to her"

Reaching behind her head you grab a fist full of her hair and pull her in deeper. She gags but starts to adapt to it, and is breathing quickly out of her nose. You pinch her nose and she stays on your cock.

It starts to frighten you how in love with it she is. She starts to coke a bit more and it becomes clear that no matter what happens to her, even if she can't breath, she won't budge from that spot.

Her face starts to turn blue, although it's difficult to see with only the outside lights shinning into your room. Black mascara tears form around her eyes giving your sweet mother a kind of gothic look. Her eyes start to roll back in her head as the air becomes cut from brain.....

This could be risky. If you cut off the air just before she passes out your control over her will fade. Although a mindless puppet might not be as fun to torment as your unwilling mother.