Both

Ellen looks away, not attempting to do or say anything.

"Don't be shy," you say, "I know that you love being filled."

She nods and wiggles her pussy at you. You smile and line the thing up. You slowly press it into her, aware that it's not moistened yet.

She keeps herself loose, allowing you to fill her up pretty good. She moans at the entry, clearly enjoying it.

Meanwhile, you can hear a mixture of moans from Amy, Kim, Jess and Lynn. They're almost too much for you!

After a couple of moments of this, you realize that you need both sides to be wet. A really wicked idea strikes you.

You pull the plastic phallus out of Ellen, causing her to break from her trance and look up at you.

"Both sides need to be wet," you say, "But I don't want this side to get dry while I fuck you with the other. Got any ideas?"

Ellen shakes her head 'no' in a vigorous manner.

"Yes, you do. You want to be filled up all of the way, don't you?"

She shakes her head 'no' once again.

"It's alright. The wet part is going to go in your ass. You can take it, right?"

Ellen shakes her head very vigorously this time.

"Be honest now. You want this, don't you? Be honest."

Ellen looks deep in your eyes and nods.

You turn the dildo around and slowly press the dry end into Ellen first, rubbing her pussy a bit while you do so. She's earned it. Once it's in, you prepare for the real fun.

Ever so slowly, you press the other round of the rubber phallus into Ellen's asshole. She keeps herself loose, allowing you to fill her up.

Finally, after a bit of work, you manage to fill Ellen's pussy and ass up with the double-sided dildo. Even you're amazed that this worked!

To reward her, you begin to move both ends at the same time. Ellen moans like crazy at the combined stimulation. Within a minute, you can see her orgasm in front of you! A couple minutes later, she cums again- even harder this time.

You slow down, allowing her one more small orgasm. After that, you softly remove both ends of the dildo and present them to Kim and Amy.

"She drenched these things," you say, "They should be ready to go."
"Good," Amy replies, "Because so are we."
"Fuck yeah," Kim says, "Get over here and fuck us!"