I had just texted her.

'Hey! I don't know if you are busy but I've been feeling sick for the last three days... was wondering if you have some time to come and check me?'

She was my ex-girlfriend. We met each other 1 year ago and had dated for 6 months or so. After some time, it appeared we had different priorities in terms of what we wanted - I still wanted to explore the world and have fun and she wanted to find someone who she could start a family with in the next years - so she broke up, but we were good. I understood her, still considered her a great woman and we became close friends (and we might have had some small sexual interludes during this time). She was a doctor, so she helped me several times when I was in need of medical assistance.

I've received a reply

'You should have told me earlier...I'll come as fast as I can. I'll take care of you, but I'll make sure you remember next time to call your doctor in good time..'

Didn't like how that sounded. Dani was this confident woman, cool and easy to talk and vibe with, but she got really pissed when her patients waited till the last minute to go and visit her. It seemed that she might be a little pissed.

I made myself some tea and got back to my bed. After an hour or so, I heard the doorbell.

I opened the door. She looked pissed as fuck

'You look like shit. You should have told me earlier!' she said and I could see her nose contracting - one of her being pissed signs I got used to

'I know...I was hoping it would pass. It didn't..'

I got back on the bed and she sat next to me. This time, she looked concerned

'How are you feeling?' she said in a warm, concerned voice

'As you said, like shit' I laughed and started coughing

'It's ok' she said and kissed me on my forehead. 'I'll take care of you'

She grabbed her bag and her stethoscope

'Ok, take your t-shirt off I'll have to listen to your breathing a little bit'

She listened to me for a few minutes and asked me to cough. She did seem a little bit concerned.

'Ok, please lay on your tummy and get comfortable,' she said. Her voice was still soft, but this time, it had a spice of authority.

I did as she asked. Then I saw her get a thermometer and some lube. I panicked a little bit and she saw that on my face

'Please don't fight with me! You already pissed me off a lot since you waited this much to call me. I'll take care of you...but it might hurt a little. Next time maybe you'll remember to call your doctor in time'

I gave up fighting and lowered my PJs directly, so she could get a nice view of my ass. She saw I didn't argue, and her voice got back to her soft tone. She started to caress my ass.

'Hey, it's gonna be ok'

Her hand then started to spread my cheeks and I felt the lube and her finger circling my anus. After 20 seconds or so, I began to relax.

'Ready?' she said in the same soft voice. I didn't have time to answer - I felt the thermometer pushing right through. I felt a little uncomfortable, but nothing I couldn't handle. I let out a soft moan. She smiled. I loved to see her smiling.

I saw her getting something from her bag

'While we wait' and I saw then two sets of syringes, needles, and vials, ready to strike. She saw the fear on my face, but I didn't complain. I knew it was for my own good.

'The first one is some B complex, and the other one is some vitamin C. It should give your immune system a boost for now.' I looked while she was preparing the injections that were about to strike my butt. I was afraid but somehow excited. I liked that she was the one who gets to treat me, to give this to me. I was actually looking forward to receiving my shots.. but I didn't tell her that.

Then, I saw her replacing the needles with some that looked WAY larger.

She looked at me 'I told you you'll remember next time to call me in time' and her face was stern, but still had a soft voice. Like she didn't enjoy this, but knew she had to teach me a lesson.

She sat above me on the bed and placed the two shots on my lower back. I sat like that for a few seconds, feeling the mix between excitement and fear. She did caress my left butt for a little bit before giving it a hard whack. I then felt the smell of alcohol and felt her swabbing it. My ass was being prepared to take the medicine. I started to control my breath and relaxed better on the pillow. Then I heard the cap going off.

'Ready?' she asked again

And before I could answer I felt the needle going in slowly in my left cheek. It did hurt and I think I tensed my butt a little bit. I felt her caressing my lower back

'Shhh' she said again in that soft voice. 'Be brave'

And the liquid started to penetrate my butt, leaving me with a burning sensation. It did hurt, but I handled myself quite well. I left a soft moan again when the needle was out, and she giggled. She caressed my butt for a few minutes, making sure I was ok. Then I felt her swabbing the other one.

'This might hurt a little bit more' she said. I did tense when I heard that. I felt her then kissing the back of my neck.

'Shh...don't be scared' she said in a sweet voice. I'm here'

And again the cap went off and the needle went slowly in. I tried to relax and take it more easily. For some reason, I found it quite erotic that this beautiful woman was straddling me and carefully penetrating my butt. After the needle was in fully, she started to inject the liquid. This time it hurt a lot more, and I felt like I couldn't handle the pain. Tears were coming from my eyes, but I didn't want to protest. She must have seen me.

'Almost done, you're doing good'

A few more seconds later, I let another moan when the needle was out again. I felt her massaging my cheek again and kissing my neck

'I know this one hurt' and again she gave me a series of kisses. My neck has always been my sensible area and she knew how to make me relax.

After taking care of my brave ass, she removed the thermometer. She looked a little bit concerned.

'From what I saw, I'm afraid you'll need another shot. An antibiotic shot this time. It will hurt a lot more than the others, but you'll need it to get well' She didn't seem pissed any longer, but was quite concerned. I smiled.

'Hey, it's ok. I trust you. I'm glad that if I had to have my butt stricken by needles, it is you and not someone else' I laughed and she laughed too.

'Ok then, I'll get it ready'

I saw her preparing the big boy, a white liquid with a needle that seemed a little larger than the ones before. I started to regret a little bit the confidence I had seconds before. When she was ready she straddled me again. I felt her swabbing my left cheek again.

'I figured it this one was less sore than the other I heard her say'

Then I felt her giving me a spank and a second later the needle going in. It must have gone in only half since she had to push it later. My eyes started to form tears and I left a soft moan. I felt her kissing my neck again.

'Almost done. Now, please be a brave boy one last time

And she started to inject. My left cheek started burning and I felt like I couldn't handle it. I was crying: 'Enouggh! Pull it out' but she was relentless.

'Shh...almost done'. It went like this for like a minute until I felt the needle going out and she started to massage my butt and kiss my neck and back.

'That's my boy she said' as she kept massaging my damaged cheek.

After I was done, she helped me put back my PJs and left. But before that, she promised to come back the next day, to give me another check - and, if the need arises, another round of treatment