Normally he wouldn't do something like that, he would still be the controlled captain like everyone knows him... But when he noticed you on the black market, your pheromones and then when he saw you, as an Alpha he had a deep urge to possess you...

Captain John Price was a controlled Alpha, normally at least.

However, you and your pheromones turned his head so much that he bought you... You belong to him.

"Get in the car, Omega. I'll drive you to our home."