That night my fingers had quiet the work cut out for them. My index and middle finger were going in and out of my wet pussy as my other hand rubbed my clitoris. All I could think about was Carlos. The shots and the steamy kisses. And I still had 3 more shots with him.

After I had 2 incredible orgasms I got nervous again thinking what he could have had in store tomorrow. Especially since he told me to brace myself. That night I couldn't sleep.

The next morning I woke up and got ready quickly. I wore loose fitting pants and a t shirt, with matching lace thong and bra.

I arrived at the health center promptly at 10am and there he was, standing all hot with a huge smile and his gray scrubs.

"Hi princess. Happy to see you"

"Hi" I said as we kissed on the lips.

"Are you ready for today? We're going to have lots of fun. How are you feeling?"

"I'm very nervous"

"I know sweetie. That's part of the fun. But you have to trust me"

I nodded. "I trust you"

"Good. For today I'm going to give you your muscle relaxant followed by vitamin C, which I split into 2 syringes one small and one big. It will sting. But you will be a good girl and enjoy it" he said as he smiled.

"Are you kidding? 3 shots??" My eyes widened and my jaw dropped. He could see my shoulders tense up again.

"What happened to you trusting me? I'll never hurt you. Or not too much I should say"

"I've had too many shots already and my butt is too sore. I can't do it. Why can't you just give me the muscle relaxant and we call it a day?"

"Aww sweetheart it's ok to be nervous. That's part of the fun. But I'm positive you will enjoy this. Plus, the vitamin C will do you a lot of good to make sure you don't get sick with all this stress"

"Fine. But please be gentle"

"Of course I will. Why don't you take your pants off completely while I go get the shots from the fridge. You can leave your panties on and lie down on your stomach"

I nodded. Was I really going to let him do this? What was I thinking? But I was very turned on and he had been so sweet and kind, and sooooo sexy.

I took off my pants and decided to surprise him and also take my shirt off. I lied down on my stomach wearing my matching black lace thong and bra.

"Beautiful!!! What a good girl. Love that you took your shirt off and you're all comfortable. This will make things easier for both of us"

I felt Carlos feeling my butt all over finding the right spots to poke. At this time I had lost count of how many shots I had gotten.

"A little cold" he said as he swabbed the freezing alcohol on both of my cheeks. "Just relax, I'm just going to give you the muscle relaxant. You know this doesn't hurt"

I relaxed and felt the needle come in. As usual it didn't hurt. I trusted him, and was very turned on. He quickly withdrew the needle and I felt him rubbing my back.

"Now Andy I want you to spread your legs and let yourself fully go. Just trust me ok? I promise you will enjoy it"

I did as he told me. I felt his fingers between my legs as he stuck me with a needle in the other cheek. It hurt. But I was enjoying his fingers. He started playing with my clit and sticking a finger inside my very wet pussy.

"That's my good girl" he said as I felt the burning serum. It was quickly over. "Now this last one is going to be much bigger and I want you to cum for me" he said as he stuck my other cheek with the needle.

The vitamin stung. It burned. But I didn't care. I was enjoying it. I was about to climax as he pushed the rest. "Ahhhhhhh"

"Great job Andy" Carlos said as he withdrew both needles. "How do you feel? How was it?"

"It was amazing. I never thought I would climax from getting shots but you turn me on a lot" I said blushing and catching my breath

"What do you say you return the favor now?"

I nodded as he dropped his scrubs. He stood near me with his giant erection. I pulled down his briefs and his big dick jumped out and was leaking precum. It was hard as a rock. I started rubbing it with my hands and giving it kisses. Slowly licking the tip and putting it in my mouth.

I started sucking harder as he held on to me. I could barely keep it inside my mouth. My hand playing with his balls pushed him over the edge and he came inside my mouth. I swallowed it all.

"Wow Andy you're incredible. That was so wonderful"

"Glad you enjoyed it. You were amazing too"

"Same time tomorrow?"

"Yes. Can't wait"

"Perfect see you then" he said as we both got dressed.