Multiple ones I

Grabbing the two tentacles, Gracie Stared at the other girls with a blank faces.

"Hold up, you don't intend on using more than one…" Alice extended her hand toward Gracie as if trying to catch her.

"Why not? Selena always takes big bites of her meat, I can also eat as much as I can." Gracie replied as she slowly got closer to Cain.

"That is one thing and this is one thing. You can only get one in your mouth." Sofia stood up, even though she wasn't able to get more than one in her mouth.

"Am a succubus, I can feed from every hole," Gracie replied bluntly. The girls stared at Cain to say something but he just weaved his shoulders. She wasn't wrong.

The succubus gets the most nutrient when using the vaginal way. That is their main feeding way. But their mouth and backdoor can also be used as it leads into the gastrointestinal system, albeit less efficiently.