Growing tired and fussy, you decide to give Kelsi the same TLC you had just administered to Randal. You approach the recliner and sit her down on your lap. You feel her mess squish and mold itself around your crotch as it positions itself even deeper against her privates. You reach into the back of her shirt and unsnap her bra. After that, you diligently work her arms through the straps and pull it out of her shirt. Tossing the dull gray underwear off to the side, you reach your hand back up her shirt--this time in the front. You begin to caress and massage her breasts. You have to do this to let her know that sexual care is about to be given to her, because she does not understand words or subtle body language.
After a few moments of massaging her chest, you begin gently scraping your fingernail against Kelsi's nipple. She wriggles and writhes around in the chair as you pin her firmly to your lap. She yelps and moans as you pinch her nipple between your index finger and thumb. You alternate breasts (by alternating hands) every minute or to. As you do that, you slowly and carefully rub her belly. As the minutes tick by, the hand you use to rub slowly descends to her pelvis, and then to her crotch. Eventually, after building her up with 15 minutes of nipple care, you are also pressing your hand in and out of the front of her diaper. By now, Kelsi is panting--drooling all over herself. You take your hand off her crotch for a moment to wipe off her chin and neck with her shirt. Kelsi wants to beg you to keep going, but she does not know how to speak. Fortunately, you return to the care a moment later. You reach over the side of the recliner and pull out from a basket a vibrator you keep on-hand just for the two of them--but especially her. Being without pants, you slide the vibrator down the front of Kelsi's diaper with ease. Already turned on at the lowest setting, Kelsi moans as a wonderful tingle begins at her pelvis and moves down to between her legs. As you make sure to maintain the care of her breasts, the vibrator slips down to Kelsi's vagina and begins to deep-and-thorough stimulate her, sending waves of pleasure throughout her body. Ironically, her own urine and feces act as lubricant as you press the ball of the vibrator in and out of the nearest point of her walls. You raise the vibrator up but a few inches, and suddenly Kelsi's own messy accident is producing an overwhelming pleasure for her, as the contents of her diaper are whipped towards her clit repeatedly. Her sexual discharge--which had been releasing in a steady stream up to this point--began to pour out of her constantly; mixing with the urine-soaked mess to produce a frothy discharge. Almost any grown woman would be made greatly uncomfortable if made to feel sexual pleasure by such means as this, and likely be turned off. At the very least, she would feel immense shame in herself for enjoying an act so unhygienic and bacterial. Kelsi, however, is not really an adult in any practical sense. She is an infant who happens to be in a pubescent body. She has the opportunity to experience sensations she is not able to understand or describe, and has no standard for cleanliness. As such, a girl cumming into her own shit? Yeah sure, Kelsi will do that no problem. She won't even realize the difference.
You go on for another 20 minutes, alternating the vibrator up and down, until you finally turn the device on higher settings and cause Kelsi to orgasm. You carry her to the bathroom and carefully remove the vibrator from the front of her diaper. You clean the vibrator off, and then thoroughly sanitize it. After that's done, you get your hands on the one who really needs the cleanup. Fortunately, you have an adult-sized changing table in the bathroom as well as the bedroom, and so lay Kelsi down and assemble a full supply of wipes, gloves and other necessities. The cleanup process is long and daunting. Had you snatched her up an hour ago the second she had deposited the mess, you likely could have finished the job with less than 10 wipes. The moment she sat down, however... well that about triples the complexity of changing one of Randal's messy diapers, but sitting in just the wrong way could spell disaster for the cleanup process... if the person who made the mess happens to be a girl. And that's just a standard cleanup; Kelsi here has just returned from an almost hour-long sexual stimulation in her waste. Suffice it to say, you have to get some wipes into some pretty far places.
Half of an entire package of wipes later, you remove your gloves, very thoroughly wash your hands and then give Kelsi a round of raspberries for being so calm and cooperative during the cleanup. You didn't tape Kelsi into a new diaper, however, as you are about to give her a bath. She hasn't had a wash in about three days, and already smelled even before she pooped herself earlier. You remove her shirt and then lower her down into the warm water. You then strip off your own clothes--revealing the massive erection from inside your boxers. You hop into the tub with her; bathing her and then yourself. All throughout, your dick rubbing against her bottom as you position your legs around her.
Once you are finished with the cleaning, you pick Kelsi up by the armpits and, getting the position adjusted just right, promptly slide her pussy down onto your cock. Kelsi gasps, surprised and likely not in the mood for more after having had her orgasm earlier. Nonetheless, you continue. She does not have the right to say no to someone who feeds her and shelters her, all the while not working or making money or doing any chores. You make sure that she does her job in rewarding the man who takes care of her. You lean back in the tub, pressing her back against your chest, hold onto her legs firmly and move your hips up and down. With the ease of the soapy water, you slide in and out, up and down, for well over another 20 minutes. By the time you near your limit, the water has gone cold. You reflexively bite Kelsi's neck as your pleasure overflows and you shoot a load of cum directly into her. You breathe and open your eyes calmly, unworried by the lack of protection used, as you keep careful track of Kelsi's cycles (not that you have any choice BUT to know exactly when her period is.) You pull out, drain the tub, dry the both of you off, put yourself in a new pair of boxers, put her in a diaper (with an extra booster inside for the long night) and a pajama dress, then finally tuck her into bed beside Randal.
With that, your work for the night is done. You binge a few hours of videos on your laptop before crawling off to bed for yourself.