Yes.

The dam ruptured and Josh felt the familiar sensation of his balls draining inside a girl.

His problem was one of inexperience. In this new world, he didn't have the knowledge nor the muscle memory other guys his age had. They'd spent their lives masturbating, learning how their bodies worked, realizing that it was possible to cum without producing semen. Blank orgasms. It was during their teenage years that they learned this vital skill, so that when they eventually bedded a girl, they could do so without the fear of leaving their partner with child.

Josh, having just changed reality, had none of that.

Even a girl's anatomy was different. Before, when a girl reached puberty, hormones in her body would cause an egg to be released once a month, it passing through her womb until it was either met by semen and latched onto her walls to grow, or be ejected from her system, leaving her childless. But now girls were always fertile and things worked differently.

Now, when puberty hit, hormones caused all of a girl's eggs to be released at once, where they then latched onto the side of her womb, awaiting fertilization. If a man were to fill her womb, his sperm would flood all of them, most failing to catch but some reaching their mark. Natural reproduction could then continue unperturbed. Either way, whenever it happened, there was always at least one egg fertilized.

In Monica's case, it was two.

"Oh god" she said, eyes wide as she felt an unfamiliar warmness fill her insides. "You did not just-" her voice trailed off, unbelieving.

"What?" her brother asked, the afterglow of his orgasm fading instantly once he caught her look of panic.

"Josh!" The girl shrieked, lifting herself off the bed and pushing him to the side. "You fucking came inside me. What the fuck?!"

He just stared at her, unable to respond. Her reaction, raw and panicked, made him forget the changes he'd made but a few minutes prior. Both pair of eyes were locked on her pussy, where a small glob of Josh's cum was starting to make its way out from between her legs.

"You fucking asshole, how could you? I trusted you!" She yelled, tears welling on her eyes as she felt him drip down her leg. "I trusted you..." she mumbled again, her tone soft and emotionless, before bolting off the bed and rushing the washroom adjacent to them, hands covering her face.

Realization dawned on him as he watched the door slam behind her. Because he'd been unable to hold back, he'd failed in following the contingency planned he'd given himself in order to bypass Monica's annoyance with birth control. He'd made girls permanently fertile, becoming with child the moment a man came inside them. Which meant...

He'd just impregnated Monica.

He was shocked to feel a bit of pride swell within him, mixed in with a bit of arousal. Something about it turned him on, having successfully bred his sister. An animistic word that - bred. He'd successfully fucked a girl until she was with child and it was riveting. Intoxicating. I made him feel like a man.

He sighed, ignoring the rising feelings. Monica clearly felt differently about the matter. While he technically wasn't in an ideal situation for having children, what with having finished college two years prior and currently working a somewhat steady job, he hadn't seen children in his life for at least a few more years. Monica less so - she was still working on a bachelor's degree, with the hopes of eventually obtaining a masters and maybe something more. Had that changed with this new reality?

That didn't matter. What did matter was the fact that his sister, his supposed girlfriend of five years, was crying in the washroom because he'd lost control and filled her with cum. She'd be graduating with a bun in her oven - large bellied as she accepted her degree. Was she currently thinking about that? Or was she more concerned about how her trust in him was now broken, like she'd mumbled before darting. Did he still have a relationship with her? Did he want one?

He sighed one more. The fact was his little sister was crying alone in the washroom and what mattered was that he loved her. His body ached, telling him to run inside after her and comfort her. But how could he, when he was the one who brought this upon her?

Unless....

He eyed the phone he'd discarded on the side table.

Could he change things once again, this time make his sister... accept the newfound pregnancy? The app had changed everything else so far, surely it could do that too. It could get him out of this just as easily as it put him in it. But was that even the moral thing to do? Was it fair to his sister?

Monica was crying.

He dived for the phone, his fingers working fast to open the app. He didn't know how long Monica would stay crying in the washroom, but any amount of time was too long as far as he was concerned. He scrolled quickly through the endless list of rules, eagerly searching for one that had to do with pregnancy. Bullet point sentences flew by the screen, Josh only having the briefest of moments to read them until one caught his eye.

• On average, couples who decide to have children only do so after having discussed various aspects of child-rearing such as parenting styles, finances, names, etc.

Good enough.

• In relationships, the men decide when its time to have children, impregnating the girls, who are happy, willing, and excited to have a child, regardless of the couple's current status in life.

Josh didn't care that the rule he wrote was the polar opposite of what was written before. It didn't even matter that the rule was unable to promote a shared partnership within couples when it came to having children. In his mind, he was the one to fucked up by impregnating Monica, and he was the one who should share the blame for that. His sister just deserved to be happy, so he made it so.

The screen flashed and Josh stared anxiously at the washroom door, waiting for Monica to exit. When five minutes had passed and she hadn't yet, he swallowed his nervousness and got off the bed, walking towards the room. The fact he couldn't hear any sobbing relaxed him a little.

"Um... Monica?" he asked, knocking the door to push it open.

Inside, his sister stood naked in front of the mirror, idly running a comb through her hair. She seemed to have a post-sex glow about her as she groomed herself, his trail of semen still leaking down her leg. The air in the room wasn't as he expected it to be. In fact, Monica no longer seemed upset or angry - she seemed thrilled.

"Yes?" she said, turning to him as he entered.

"Is... Uh, is everything alright?"

At his words, she grinned. "How can it not be?" she said, with tears in her eyes. Unable to contain herself, she closed them and cocked her head to the side, a smile beaming happily. "We're having a baby!"

His heart melted, watching Monica smile again.