Shepard accepts, but it was all a trick

She couldn't risk not accepting Liara's offer and being at the mercy of Diana Allers. "I consent," Shepard said as Liara approached the stage and grabbed the ball gag from Aria wrapping it around and gagging Shepard. She then took a blindfold and put it over Shepard's eyes and took some noise cancellers and put them in Shepard’s ears. At that point Shepard couldn’t hear or see anything, not one thing as she was put into the position, her bare cheeks and pussy lips pointing to the audience.

Aria smiled and said. “I can’t believe that worked so well. She really can’t hear anything. Very good Liara, you played your role perfectly.”

Liara nodded as of course, she had been in on the plan as Shepard was too predictable. “I am intrigued as to what you will do next, Aria,” Liara said. “After all you only told us this much.”

“The answer is simple,” Aria said. “I’ll be spanking Shepard of course, but… with a bit of a larger audience than initially anticipated. Diana, you may start streaming.”

Diana nodded as she waved her drone over and started to speak into the camera. “Hello and welcome to a live edition of my new segment exclusively made for the adults of the universe, and to kick us off we have the great Commander Shepard all obedient as ever. So sit back and watch as the Queen of Omega disciplines the once revered Savior of the Galaxy.”

“And now to get an easy trillion views on the Extranet,” Kasumi mumbled as she also started recording just as Aria stepped in front of Shepard exposed and unaware of what was happening.