Yes, but with one condition

The shopkeeper dives beneath a pile of scrolls and pulls out several blank sheets of parchment. After going back to the chest for more, he also produces a fancy metal pen and a glass inkwell, showing the pitch-black ink inside.

"That sounds like a fine trade. Complete three new scrolls and that one is yours." he agrees, "but I have one additional condition," he adds as he pushes the stationery towards Siora. You both nod in approval, glad he is so receptive to this trade and expectantly waiting for his counter-offer. To your surprise he turns to you to explain his condition. "All I ask is that while the elf makes those scrolls, you come back here and help me out with that sexy body of yours."

You are a bit apprehensive at this suggestion, glancing over at Siora for support. She gives you a reassuring smile and that's all the confidence you need to agree. It's not like you have much negotiating power to refuse him in this situation, but the knowledge that Siora approves is enough for you to lose the nervousness. As Siora dips the pen in the inkwell and begins drawing some arcane diagram the old man holds his hand out, ready to guide you around the counter and to the back of his stall.

This section of the stall is completely hidden from the rest of the market. Back here is only a small table and chair and a few large bags which likely hold the merchant's traveling supplies. He turns the chair towards you but before he sits down he undoes his belt and takes off his pants. He drapes his pants on the back of the chair then sits down, legs spread wide, stroking his stiffening cock. I do not need instructions to know what he wants me to do. Wordlessly I kneel between his knees and take over stroking his cock.

Once his prick is sufficiently erect you lower your head between his thighs and wrap your lips around the tip. His cock is below average in size which makes it easy to fit the whole thing in your mouth. You look up at him as you bob up and down on his cock, hoping eye contact will make him finish sooner.

"Yeah, that's it," he groans, keeping eye contact with you. He places a hand on the back of your head, giving pressure firm enough to encourage you to continue but not forceful enough to press your chin against his hairy ballsack. You lose track of time as you continue pleasuring his aged cock. You quickly realize you don't actually know how long it would take for Siora to create three completed spell scrolls. You hope for your own sake that she picked spells that are quick to inscribe.

This old merchant doesn't have the level of stamina he might have had as a young man and your technique doesn't take long to bring him to cum. The sudden salty taste takes you off guard and you nearly ****. You pull yourself off his cock and cough as you spit his seed into the dirt.

You know this old man can't last a second round, but Siora isn't done yet.