Her kids help her with her condition

"We want to help mom," Ian began. "We're both adults -- I'm more than happy to register as your main partner whenever you need cum."

"Me as well, I can help get you off, well, I mean it's for medical reasons, right?" Darla added.

I thought about it. It was strange to be considering ****, but this was what was necessary, right? Maybe the condition will get better?

"I don't know, I--"

Doctor Li returned with a clipboard. "You can think about longer-term things later, but in the mean time you need to orgasm."

I cautiously lowered my skirt and then panties. Darla quickly approached me and began eagerly stroking my nether lips, causing me to moan unexpectedly as I felt myself fall into arousal. Meanwhile Ian was removing his clothes to get naked.

I rolled my head back as my daughter's fingering was getting to me, moaning more. Darla spread my vulva apart, then backed off as Ian approached. He held his cock in position, preparing to enter me missionary style.

"Are you ready? Mom?"

Doctor Li was diligently keeping notes.

"Y-yes, I am." I barely made out. I laid back my head as his member entered me. Damn, it was really thick.

He began moaning as he gathered his thrusting rhythm, while I tried to brace myself and buck my hips. Darla was watching, masturbating to the scene. Somewhere along the line she had become bottomless.

"A-a bit slower--" I requested, and Ian did so.

We kept fucking for another few minutes before I saw him tense up, and then felt a large warm pool enter my womb. I felt glad that I was essentially sterile now.

Darla was apparently near orgasm from touching herself, and in a moment of lust approached to squash her pussy into mine. It was shocking (but then again, what today hadn't been), but in the heat of the moment I reached forward to kiss her.

We stayed like that, wriggling and moaning, for another solid minute.

Doctor Li cleared her throat. "So it seems you're doing a lot better. Please remember to orgasm again in three hours."

She handed me a standard EDP watch / timer that was ticking down from 2:59:00. I took a look, and eventually gathered the strength to put it on.

"I've taken the liberty to register you and your two children as your primary partners. You can change this at the courthouse if you wish, but for now all three of you are not subject to public indecency or public lewdness. Additionally, Ian and Darla may not wear bottoms," she continued.

"Bottoms as in, we can't wear pants? Or underwear?" Ian asked.

"Yes, for new or unusual EDP cases partners need to, in addition to being ready to administer orgasms when necessary, be always equipped to do so. Your butt and genitals need to always be exposed, though you can wear less if you wish."

And with that, the doctor left the room.