The same way as Canari

He begins rewriting her mind just as he did with Canari, placing one tentacle on either side of her head and allowing psychic energy to flow between them. And just like with Canari, she immediately stiffened and began to shake as her body was overwhelmed with pleasure.

"You belong to me. Your main purpose in life is to serve and obey me. Anything I desire you will endeavor to fulfill. You shall maintain your intelligence and memories of your life, but you will have a new purpose - serving me as my slave and assistant in my pursuit to conquer this world and it's women. You belong to me in body, mind, and spirit, and will work to ensure any other woman I desire is subject to the same."

As was before, with a powerful orgasm Mable's fate was sealed.