Undertale AU's lemons and stuff

Nightmare x Dream x Cross

Cross P. O. V they are human

I walk into Nightmares office he seemed pissed when he called for me.  Once fully in I hear the door lock but don't look behind me.  "You're finally here took you long enough" I hear Nightmare say someone hugs me from behind softly.  "Don't be mean Nighty" Dream says to his brother.  "Stop being overly nice" the go back and forth for a bit.  "Um why was I called in here?" I ask.  Dream goes in front of me while Nightmare goes behind me.  "You should know already" Nightmare says pulling me closer to him while Dream trys kissing me.  I hold in a laugh and pick him up kissing him.  He kisses back wrapping his arms around my neck and legs around my waist.  Nightmare pulls off  my pants and boxers then pulls my shirt up.  I gasp and deepen the kiss sliding my tongue into Dreams mouth making him moan into the kiss.  Nightmare pulls off his pants and boxers then pushes into me making me moan.  Dream breaks the kiss and looks at me needingly.  "Start fucking him already" Nightmare says.  I put Dream down so he can get un dressed while Nightmare rips off my shirt while thrusting. I moan softly as he does.  Dream finishes undressing and I pick him back up.  Nightmare pulls out then pushes us to the wall and thrust back in.  I slowly push into Dream making him cling to me more moaning softly.  I reconnect our lips as Nightmare starts biting and sucking at my neck thrusting harder and faster.  I moan into the kiss not able to keep it going for long.  "mmm Nightmare master please more" I beg. Making him go faster and harder as well as deeper hitting my prostate.  " Crossy please more I need more of you" he begs with tears in his eyes.  I start thrusting faster and harder.  "fuck I'm close" Nightmare moaned in my ear after a while. It sent shivers down my spine.  "Dream holds onto me tightly while moaning sweetly.  I swear I can get off on just his moans. Dream cums first.  "Nyaaa Nighty Crossy" he moans as tears fall from his eyes from all the pleasure.  Nightmare and I cum at the same time  making us both moan loudly.  Nightmare pulls out of me while I pull out of Dream and sit on the floor. After a few minutes Nightmare starts talking "we aren't done yet" pulling us off the floor. Boss we are tired Dream looks ready to fall asleep" I say holding Dream as he lays his head on my chest with his eyes closed.  I pet him making I'm purr slightly.  " he's fine and why I want to do more we are both fucking him" Dream holds onto me tighter.  "I'm scared" he whimpers. I kiss his head.  "Boss he can't handle it he's to fragile" I stat.  He pulls me and Dream closer then pulls out Dreams soul.  Here play with his soul while I prep him for both our dicks" Nightmare says.  "Please be careful Nighty" Dream begs.

Nightmares P. O. V

I telaport us to my room and get Cross to lay Dream on my bed.  Cross sits so he can hold Dreams and.  I watch as Cross starts rubbing Dreams soul making my cute brother moan sweetly.  I slowly push one of my tentacles into him slow.  Dream covers his mouth and moans loudly.  "Moan as loud as you want unlike my office no one can hear us" I say moving his hand.  I let to more of my tentacles go inside him making sure there is room for both mine and Cross dick.  Dream tears up a little from the pain and whimpers.  Cross starts sucking on his soul sending pleasure though Dream. I thrust my tentacles in and out of him until he's use to them.  I soon pull them out and pick him up.  Cross let's go of Dreams soul letting it go back in his body.  I kiss Dreams chest for a bit calming him down before kissing and marking his neck.  "Ready?" I ask he nods so Cross and I both slowly push into him.  Dream again tears up so I kiss them away then capture  his lips in a sweet kiss until he relaxes.  As soon as Dream relaxes I break the kiss and we start thrusting.  " a-ahhh Nighty Crossy feels so good" he moans out.  Cross marks the other side of Dreams neck.  "Dreamy who do you belong to" I ask thrusting into his prostate along with Cross.  "You two" he pants out.  "what was that" Cross asks "I belong to Nighty and Crossy" he says "louder Dreamy" I say as we get close.  "I belong to Nightmare and Cross!" He screams. I give him a kiss as a reward.  "That's our good boy" I say.  "I'm close" Cross says as his thrust get a bit faster.   "c-can I cum?" Dream asks in tears.  I him and he moans loudly cumming on himself and me. He tightens around both Cross and I making us both cum deep inside him.  We slowly pull out and I lay Dream on the bed kissing him gently before laying beside him and holding him close.  "Cross come lay down" I say.  He gets into bed and pulls the blanket over us. We fall asleep holding Dream.

Next day Dream's P. O. V

I wake up in pain so I just lay there in Nightmare's bed hearing some yelling from the hallway. I close my eyes until I hear the door open.  " that was fucking amazing he yelled so loud the others heard" I hear my brother say laughing.  "This is the worse" Cross says coming and sitting next to me. "oh hey how'd you sleep sweetie" Cross asks.  "Good" I mumble "how does your ass feel" Nighty asks "it hurts" I whine.  He comes  over and holds me.  "My poor baby brother" he teases making me pout.  Cross kisses me.  I wrap my arms around his neck kissing back happily.  He nibbles my bottom lip asking permission.  I let him slide his tongue in my mouth.  I moan into the kiss as our tongues inner twin.  Cross holds me closer pressing our body's together.  I gasp a little but smile.  we break the kiss only for Nightmare to push Cross out of the way and start making out with me.  I let it happen.  After hrbreaks the kiss he holds me in his lap.  "I love you both so much" I say "and we love you two" Cross says.  Nightmare kisses him.  "And I love you two idoit" nighty says.  I smile at my two lovers and fall asleep in their warm embrace

Christmas thing I guess enjoy