Her engagement to Riser, and confessing her genie nature to Sirzechs!

"You remember what I said about Sirzechs recognizing that something would be seriously different about me, next time he saw me?" Rias asked. Issei nodded as he moaned, Asia dragging her tongue up his length, and fondling his scrotum.

"Yeah... I do," Issei groaned.

"Well... I'm going to need your permission to tell him everything... Especially the fact that I lost my virginity to you," Rias replied with a grimace. "There's an... Engagement I've been trying to get out of ever since it was decided for me."

"... engagement?" Issei questioned, staring at her, stunned. "Wait, do you mean that literally?" Asia paused her own oral attentions to glance at Rias.

"... unfortunately yes, Master. I was betrothed to Riser Phoenix. Without any say in the matter, I might add," she stated darkly. "It was political. However, lacking my purity might be enough to get my brother to call off the engagement... Politics again."

"... can't we just wish the engagement away?" Issei asked.

Rias grimaced and shook her head. "Unfortunately, not. Sirzechs... Is one of the Four Satans... He is powerful enough to challenge gods. Not capital G god, but lesser ones. Which still puts him above a genie in terms of power. He'd know the difference immediately."

Asia engulfed Issei's cock in her mouth, and he groaned. "...then... What would stop him from just ordering the Lamp confiscated or something?"

"...the thought crossed my mind, Master..." Rias admitted. "But we can't avoid him finding out any longer. And trying to lie to him would make things worse."

"...do what you need to do," Issei sighed, realizing that Rias was right, this was unavoidable. She knew more about this than he did, and if she could come up with a way to ensure staying with him, she would have done so already.

Biting her lip, she nodded, before leaning down to lick his scrotum, deciding to at least finish the morning blowjob before leaving. Before long, Issei grunted as his cock throbbed, and Rias pulled away, pulling Asia back, making her yelp in surprise. Issei proceeded to cum over their faces, sighing in pleasure as they stuck out their tongues, Asia mimicking Rias, to catch some of it.