Quite arousingly.

Kurumu suddenly moaned, but didn't stop licking at Moka's clit, remaining focused on her task. Even as she did, her boobs swelled up a bit, a barely noticable amount, but it still caught Kurumu's attention. She still didn't stop with the licking of Moka's cunt until Inner Moka grabbed her by the hair and pulled her away. "Good job, slut," she smirked.

Kurumu nodded as she pulled back, and felt herself up. "What did you do to me, Master?" she asked Tsukane, before moaning as a spurt of milk came out. "...never mind, I think I just answered that..."

"Hmm, that could get messy, let me fix that," Tsukane noted, picking the Note back up and writing in it again, "Whenever Kurumu Kurono is lactating, the milk will not come out unless her breasts are being actively sucked on."

"Good thinking, I will not be cleaning that up," Inner Moka snarked, before proceeding to latch onto one of Kurumu's breasts and sucking.

"Ah!" Kurumu gasped as she threw her head back, and held Inner Moka's head against her tit, letting the milk flow out.

Inner Moka took a few swallows, even as Tsukane chuckled. "I guess my neck is gonna be a little safer now..."

"Think again," Inner Moka smirked, pulling off for a second to tease Tsukane.

"...worth a try," he sighed, weeping anime tears.

Inner Moka finished with one of Kurumu's breasts, and moved onto the other. After having her fill, she pulled back, and switched back to Outer Moka. "Well... My Inner Self has had her fun," she stated, sitting down. "So I guess you two can just enjoy each other for a bit..."

"Oh, Master, can I give you a tail job?" Kurumu asked, jumping up and down eagerly, letting her boobs bounce for Tsukane's viewing pleasure, even as she let out her tail and wings.

"... what's a tail job?" Tsukane asked.