Nothing that you can see.

"So, does that hard cock poking me mean that you are still horny after sex with a succubus?"
"Actually, yes. It just turns me on to talk about it with you."
"Yeah. So both my holes are full of cum, but you are welcome to either," Amy tells you as she stands.
"Well mine is too," you tell her as you rise.
"And we have the proof too. Your butt is swollen a bit."
"Well she did go at it rather vigorously." You feel she is right, your butt cheeks have swollen a fair bit. "Yours too."
"Oh, so it is. Weird, we didn't do it that way either...at least as far as I remember."
"So, you said you had a big strap-on?"
Amy smiles wide. "Oh, I see how it is; get me naked and then I have to do all the work."
"Well you were the one that wanted to use her strap-ons."
"I was just being playful! I have several sizes and shapes of ladycock. Which one should I get?" She rubs your butt.
"Mmmm, that feels good. You have anything that will fit me?"
"Hmm..." she trails off as she kneels behind you. "You do look rather worked on back here. Don't mind me..." she tells you as she probes your butthole with her hands. Your breath catches a moment. "Sorry! Did it hurt?"
"No, it felt nice."
"I was concerned a moment; I thought your swollen butt was hurting." Before waiting for a reply, she begins working her fist into you. It only takes a few seconds. She must have small hands.
"Whoa! Is that your fist?"
"What did you think it was? I need to see how big you are," Amy explains.
"Good idea, you should use both hands," you tell her as you thrust your butt out a bit.
"I think I should," she giggles. She flattens her hands together, then easily slides them inside of you before clenching her fists.
"It was like this big," you tell her.
"What was?" She starts pulling on your butt with her fists before pushing them in. She starts to double fist-fuck you.
"The big cock of that succubus...it...pulled on me...just like this," you manage in between breaths.
"Really? Interesting." She doesn't slow down.
"You are gonna make me...shoot," you finish too late. Your cock spurts cum all over the couch in front of you.
"Did you just cum? Wow, you did! I felt your ass contracting. I think it wishes it was that demon cock again. It was trying to milk me." She finishes removing her hands from your ass.
"I wonder why," you respond after catching your breath.
"Probably because your butt is greedy for cum. I can't give you that, but good thing your butt doesn't get tired even after you cum. Right?"
"Technically," you grudgingly admit.
"Excellent! I'm sure I have something in your size. How big did you put in for your doll?"
"Footlong," you respond proudly, "and thick."
"Hum," she ponders, "I think the one I normally use isn't thick enough for you now. I do have one that I think was meant more for show than use; it may be more than you prefer, but I want to make sure you are satisfied."
"I'll give it a try," you answer.
"Oh good, I'll grab it." She walks off, swaying her hips. "I like to imagine I have a long cock swinging side-to-side," she tells you as you stare at her swaying ass. It looks a bit swollen. After a few minutes, she comes out wearing a huge strapon that swings in front of her as she sways her hips. "Like this," she continues, but you aren't sure if it's a statement or a question.
"Very much," you answer anyways.
Her breasts jiggle pleasantly, at least a heavy C cup, which you think is larger than you remember, but must not have been paying attention to.
"Well I am glad you like the look! 14 long, 4 across. I think I will need to make bigger ones myself, so I can add a larger head." She laughs as you lean over the edge of the couch.