Katrin's breath-hold-education

Katrin teaches her slave in breath-holding-techniques with her ass and weight.

She steps over him and chains his hands on the special facesitting-bench.

Securely fixed and helpless, he looks at her great ass, which slowly decends on his face, realizing that this lesson under her ass gets hard and painfull.

She sits consequent and heavy on his face, He struggles because lack of air, but she continues with her "No-oxygene" lesson....

may be until his face has the same red like her dress.