He does

"You know what? Why not?' Byleth nodded, Sothis clapping as the two found a place to sit. Surprisingly, there was a wooden bench just waiting for them to recline on. "Dream world, remember?" Sothis taunted playfully as she poked his cheek. Petra began to take her position, before halting. "Master, I just realized something, this dance is usually done as a group. I admit, I am uncertain how to resolve this issue." Sothis sighed as she heard this, the naked genie pinching the bridge of her nose. "I swear, the two of you are so uncreative. We're in a dream world, for crying out loud!"

"Ah, I see..." Petra replies with an embarrassed blush. Taking a moment to focus, she closed her eyes as she pressed her palms together. As she did so, the outlines of girls resembling her naked form began to manifest in a ring around the bonfire. After a few moments, there were almost a dozen Petra's outlining the fire.

"I do hope you enjoy the performance, Master." Petra bowed before him, the duplicates following suit. Sothis grinned as she watched the cavalcade of bosoms bounce before them. Petra then began hopping around on one foot around the circle, alternating the leg every third hop as she chanted a prayer to the spirits.

Byleth just decided to let things continue. It was nice, just learning more about Petra and spending time with her. Sothis may disagree on some level, but she was enjoying all the Petra copies bouncing their breasts with each bouncing hop.