"Ah...  Yes...  Raven, I'm gonna-- AH!" The squirrel gasped, his seed flowing into the mouth of his feline lover.  She did all she could to suck every last drop out of his spent member before spitting it out into a small cup.  The squirrel fell backward onto the bed, trying to catch his breath, while his partner crawled up and gave him a big kiss.
  "Thanks hun, you did great," Raven said.  The twenty-two year old cat got up off the bed and walked over to a table that contained another cup of semen, various other ingredients, and some candles and incense.  "Now all I have to do is mix this all together.
  "Raven," He said as he sat back up.  "What exactly are you doing with this?"
  Raven turned around with a smile on her face.  "Well, Jess, if you really want to know, I'm making myself a fertility potion.  I need the seed of my current lovers, which are you and my dad.  Oh, thanks for getting the rest of this stuff at the store earlier.  You're such a sweetheart."  She walked over and kissed him on the forehead before returning to the table.
  Jess chuckled.  "I thought you might be trying to make a homunculus that combines me and your dad," He said.  Raven laughed while he grabbed his shirt and started getting dressed.
  "I didn't think about that.  See, that's why I love having a boyfriend that's into this stuff," She said.  Raven grabbed the two cups of semen and poured them into a larger bowl, and started to mix the other ingredients together.  "You know, my grandma had her first kid when she was thirteen, and mom had hers when she was twelve.  I'm ten years behind!"
  "But Raven," Jess said, "You've been on birth control since before we met back in tenth grade.  If you wanted a baby that badly, why stay on the pill?"  He stood up and pulled his underwear and shorts up around his waist.  He walked over behind his lover and looked over her shoulder, pausing briefly to kiss her on the neck.  He started to wrap his hands around her waist when she shrugged him off.
  "I know, but I wasn't ready then.  I'm just teasing, you silly squirrel.  But I can't be cuddly now, I'm busy," She said.  Jess sighed and walked into the other room, letting his kitty do her thing.

An hour had passed before Raven walked out of the bedroom with a glass of a red liquid.  "It's done," she laughed with an almost maniacal twinge.  "I followed the book to the letter.  This should increase my fertility.  What's more, if I calculated correctly, I should be ovulating.  I'm so excited."  She started bouncing up and down.
  Jess paused his game and turned around to see the perverse joy on her face.  "That's nice, hun, but don't you think you emptied me earlier?" He asked.
  "Oh, that's why I whipped this up," she said, producing a small vial of a blue liquid.  "This will increase your sperm production.  Drink it now, and you'll be ready to fire your biggest load into me in an hour."  Raven handed him the vial and winked.  "Now don't keep me waiting too long, sexy."

Another hour had passed.  Jess had consumed the blue liquid right after Raven handed it to him.  He had delved into these occult potions many times with her, and while there were some misfires, she usually knew what she was doing.  Jess wasn't too shabby, either, but he made a few more mistakes than she did.
  Jess walked into their bedroom to find Raven naked, legs spread, with a devilish smirk.  "You ready?" She asked.
  Without saying a word, Jess disrobed and revealed his throbbing erection.  He crawled onto the bed and Raven lifted her legs.  In one thrust he was inside her and pounding away with a passion she had never felt before.
  "Oh god, Jess!" She gasped.  Her legs wrapped around his hips and her arms went around his neck, pulling him in for a kiss.  The bed squeaked and the sound of their bodies slapping filled the air.  Raven started to moan.  She broke the kiss and gasped for air as the sensation was stronger than she had ever felt.  His increased passion mixed with her fertility potion made for the most intense feeling ever.  She pulled her knees closer up so he could go even deeper.  She panted and rubbed her hands all across his back, whispering in his ear encouragement to keep at it.  She loved the sensation of his warm penis sliding in and out of her moist vagina, but this night he seemed larger than before, and it was hitting all the right spots inside her.  He slammed against her cervix as if trying to burst through.  It hurt a little, but both were so consumed with passion that it didn't matter one bit.
  Jess was going at it like an animal consumed by lust.  He wasn't saying anything, just grunting every other thrust.  Raven dragged her fingernails across his back as her hips started to buck.  "Oh god!  Oh fuck!" She screamed.  Her legs clenched, trapping Jess closer as he exploded inside her.  The feeling of all that semen filling her womb and spilling out overwhelmed Raven and pushed her over the edge.  She let out a yell as she climaxed.
  Seconds later the couple collapsed on the bed, both panting in exhaustion.  "That...  That was amazing," Raven gasped.
  "It was almost like I was possessed," Jess responded.  "It was so good.  We have to do this again someday," He continued.  The couple cuddled together until they both fell asleep as a collection of semen and vaginal fluids flowed from their groins and onto the sheets.

Two days later Raven came out of the bathroom with a pregnancy test in hand.  "It worked!  Jess, I'm pregnant!  We're gonna be parents!" Raven yelled, bouncing with excitement.
  Jess turned around and smiled.  He got up off the couch and hugged his girlfriend.  "That's awesome, hon.  But, I have something just as good."  Jess reached into his pocket and pulled out a ring.  On it was Raven's birthstone and various occult engravings.  Raven gasped at the sight, and Jess got down on a knee.  "Raven, my beautiful lover, mother-to-be of our children, will you marry me?"  Raven burst into tears and could do nothing but nod.  The pair embraced once more, thrilled with the knowledge of their future life together as a family.