Tyra uses her slave as human furniture with two functions, he is her seat and ashtray, two in one ;-)
She sits on his throat first in schoolgirlposition and smokes a cigarette and uses his mouth as ashtray, sitting on his throat, his head between her tighs gives her good control over her ashtray-furniture.
Later she streches her legs for more comfort... her comfort, not his, because with streched legs her full weight comes on his throat, breathing is more difficult, reaction is more gasping for air...
A gasping ashtray ;-)
Katrin has her slave on a stool on his back, his head is bendt over the edge, his throat and larynx fully exposed, ready for the treatement.
She sits first reverse on his throat, putting all her weight (this is a lot!) on the poor throat, his neck gets bendt back to the maximum, short before it breaks.
She changes several times the position and direction, sits foreward, sideward, again reverse and so on.
The windpipe under her gets full crushed and the necks breaks nearly, she's like a guillotine wich beheads her victim.
After 4 minutes he was totally destroyed, so we had to stop the clip.
Don't try this at home with a lady of this size and weight!