Maria is amazed by the data.

The team observes you and your daughter for the rest of the day, and are shocked. You and your daughter just keep going and going, and you seem to get stronger each time.

The two of you fuck and orgasm, rest and then wake up and fuck again. Kira sucks your cock from the soul, now taking you deep into her throat.

Your heart rates baseline a bit lower after each fuck, and your resting blood pressure keeps getting better and better. At the end of the day, after the two of you wake up, Maria has you and Kira measured and weighed carefully.

She shares the details with you, you have both become more fit in the two days you have been in the lab. You have lower body fat percentages, overall fitness has improved and a scar you have had your entire life is harder to find.

You would also swear that your dick has gotten bigger, but that could just be in your mind. Of course it wasn’t. Maria determines that your dick is getting just a bit bigger. Not by a lot, but to clinical measurement it is obvious.

Kira wakes you and fucks you in the night, and you consider that after this volume of sex both of you should be sore, but you have never felt better.

You and your daughter go at it until you both fall asleep, into the orgasmic bliss you have both been enjoying.

You wake up in the morning naked with your daughter, getting up to use the restroom and clean up, putting on some comfortable clothing. After your shower you look at yourself in the mirror and you see your abs, it has been a while since you saw them. You are really starting to look good.

When you walk back into the room you see Miguel checking your daughter’s vitals, you can feel he wants to fuck her, but he has done nothing overtly creepy so you let it go.

She is sitting before him naked and unashamed. He is staring at her beautiful breasts as he works, but you would not hold that against anyone in his position.

His touch is gentle, but as he checks her heart rate his hand and his stethoscope touch her breast, and you can feel his want for her. He doesn’t grope her, but he does keep his hand on her tit longer than maybe he needs to. He pushes the stethoscope deeply against her large and soft breast.

Kira gets up and uses the restroom herself, asks you to join her, and why wouldn’t you?

You haven’t had sex in a shower in years, not since Kira’s mom was alive, you had missed it. You fuck standing up, like in pornographic movies, but you find your strength and flexibility equal to the task.

Given where you are, and knowing what happens when you cum inside of her pussy, you have her kneel and you put your dick in her mouth as your orgasm.

It is awesome, not like cumming inside of Kira, but watching her swallow cum is also beautiful.

What it does do is allow you to resist the slumber that often follows sex with your daughter. Kira drys herself with a towel, and then walks naked back into your room, in full view of the staff.

You marvel at her young body, it was fantastic, but it is getting better. Her ass is still big and muscular, her hips are still wide and her breasts may have grown, but she is more lean, you can see muscle definition you didn’t see before. It is breathtaking.

At lunchtime a new staff member brings your lunches, a beautiful new intern you haven’t seen before. You see her name is Joy, and you see from her access badge that she is a first year intern. This young woman is striking, she is very beautiful.

When she walks out you watch her ass wiggle as she leaves, before composing yourself and turning to your daughter, who has a jealous scowl on her face.

“Don’t get ahead of yourself old man,” she comments, “you are all mine for another day.”

You spend the rest of the day naked, not even putting on clothing when medical staff enters the room, you don’t want to waste any more time.

You fuck most of the time you are awake, not knowing what tomorrow will bring. You keep fucking even as Joy and Miguel enter the room. The two of you put on quite a show for the two young doctors as they check vitals and data.

Maria has been studying ever more data. Based on available samples, she is almost certain that your close relationship and shared genetic markers were involved in the mutation of the disease in Kira and you catching a version of it. She determines that while the health risk seems to no longer be present, that at least in the case of you and your daughter, the sexual addiction is still present, but seemingly only with each other.

When she shares this data she that has gathered after the two day cool down, you and Kira will test to see if you and Kira can pass it to others. It might not be comfortable, but it is very much needed to save lives.

You and Kira know the day is getting short, and you don’t have that much time left, so you really let it all go when you fuck, with you pounding away on Kira doggy style, and with her ass looking better than ever.

Your emotions rise as you are used to, but this time it is Kira who orgasms, and powerfully. Her kegal muscles grip your cock tightly as she moans and shakes, and when she relaxes a bit, you pin her to the bed with her ass up and pound as hard as you can, and Kira goes wild.

When you cum you hold her ass tightly, holding your cock deep inside as you fill her with your sperm. You feel a jolt of energy within you, it is like time is slowing down, and that is ok because you would love to stay in this moment for a while.

You have your beautiful daughter pinned beneath your weight, your cock buried inside of her, your cum still shooting deep inside of her body.

Maria is watching the data from the monitors, the data output is incredible. The rest of the staff in the observation room is also amazed, but in general they are excited, and Miguel and Joy are no exception.

Both are horny, and are biding their time. Joy is wet with anticipation, looking at what you are doing to Kira, she wants you to fuck her just like that.

Miguel is also excited, he is as hard as he gets looking at your daughter.

Neither of them can wait.