You walk over to the 'milking' machine that Bessie had attached to the Minotaur and remove the filled canister from it. You then grab an empty syringe and fill it with the Minotaur sperm from the canister. After that, you walk back to the stall that the unconscious Bessie is chained up in.
"Spread her legs." You tell the Minotaur, and with a wicked grin on his face he does.
"Wont she be overjoyed when she wakes up to discover that she going to be a mom?" You say sarcastically as you use empty the syringe of Minotaur sperm deep into Bessie the Cowotaur's pussy.