Yes

Porthos's spread legs revealed the base of a buttplug, silicone and thick (though not as big as his cocked, it looked comparable to Aramis's girth). Aramis pressed it into him, smiling at Porthos's wince of arousal.

"You come prepared, hm?"

"I needed a good, hard fuck," Porthos said, "so I wanted to be ready. You gonna give it to me?"

Aramis didn't answer, just gently tugged the plug out of Porthos's ass, enjoying the slight gape it left behind and sliding two fingers in all the way. They went in easily. Aramis gently removed them and pumped some lube onto his hand from bed-side dispenser. He spread it evenly over his fingers and then returned them to Porthos's slick, welcoming hole, this time pushing in with three fingers.

"Yes," Porthos groaned, "yes, that's perfect, I'm so ready. Can you feel how much I need it?"

Aramis pulled his fingers out and slicked up his cock, lining up and pushing into Porthos's ass deep and slow. He stopped when he was tall the way in, trying to catch his breath and not come immediately.

The door bell jingled and a regular customer came in.

"Ah, d'Artagnan, I'll be with you in a moment," Aramis called.

"You can watch," Porthos offered hopefully, "or maybe you wanna join in?"