If they're worried about bastards there is a way around that.

I had to word what I said next carefully. As I said my normalicy tended to ensure that my actions were always seen as totally routine and common, but if I wanted to get people to act differently than normal I had to spin a bit of logic their way. The trick I found was to state everything as obvious fact, usually people would agree and act accordingly. When I first bangged my mom I did the same thing to ensure she treated draining my balls as an act of motherly affection. It seemed hotter than just telling her we were going to fuck, which turns out to be true. I really should call her someday. My youngest sister would have her birthday coming up soon. Mom was always complaining I didn't see her enough despite being her father.

Similing at the memories of that spring break I pulled my still hard cock out of little Aubrey and moved her into doggy style position before pushing back inside. She groaned but I ignored her as I began my little talk.

"Listen," I told her in the same tone I might use to explain how to send an email. "I get that you don't want to have a bastard, and Sara likely will end up in the same spot sooner or later. Wouldn't it make more sense for you two just to marry each other?"

"What?" both girls exclaimed in slight confusion.

"Yeah," I continued before letting out a little moan as Aurbrey's little cunt gave an idle squeeze. "You two are besties right? It makes sense to get married to your best freind. And you can help raise your kids together."

"But Aunt Tara, we're not gay."

"Not even a little?" I said with a smirk. Aurbrey gasped but shook her head. Sara, interestingly, simply shrugged. "Well that doesn't really matter does it? You guys don't really need to fuck each other to get married. It's ~ugh that's tight~ more about having a family. Though I do think it'd be good for you to fuck every now and then. It's just the normal thing to do in this situation right?"

"I suppose..." Sara agreed slightly dizzy sounding as her worldview began to match my words.

"I ~ugh~ guess that makes sense." Aurbrey also agreed as I started to pick up the pace. For a few minutes no more words were spoken as I started to ride her like a cheap mule. I came with a shout and another blast of cum right into her womb. I stayed hilted inside as the last few shots fired out of my cock. Slowly I pulled away and laid back on the bed.

"We might have to rush the wedding," Sara muttered. "You cum a lot Auntie."

"Yeah," Aurbrey agreed as she got into a kneeing position looking down at me. "This was a bad time after all, I might not get out of this weekend without a baby. My mom is going to be pissed I had to marry so quickly, she really wanted to have a big wedding for me."

"I'll talk to her," I assured the girl. "Now why not seal the deal with a kiss to your new fiance? That's normal after all."

The two teens shrugged before slowly and unsurely pressing their lips together. The both pulled apart in a moment both looking slightly unsettled.

"Now, now," I chided smirking. "You both can kiss better than that. This is the woman you'll spend the rest of your life with after all. Really kiss."

Both of them shot me a dubious look before pulling together once more and kissing like they meant it. I watched them make out as I drifted off for a nice post fuck nap.