Haha, thanks for all them reviews, guys. It's ironic that all my "sex" fanfictions are getting love.
So here it is. Finally!
You decide if this is the end, enough, enough, enough, or if you want more.
It was a pleasure writing this, just saying. Mama, we all go to hell… :D

"Park on the other side of the driveway, detective..." David suggested.

When Mark disappeared into the darkness, David turned toward Lawrence and it wasn't the top of his shirt that opened to expose him, but the part below the belt.
He noticed as his legs were exposed almost all the way up to his cock but it was too dark to see anything.
When David made no move to cover his legs, Lawrence reached over and ran his rough doctor finger along the brunettes exposed thigh. A
shiver ran through the young beauty but he didn't stop the doctor;
on the contrary, he actually spread his legs apart.
Lawrence took this as an invitation and ran his fingers up his inner thigh, then started to caress him.

They started making out as Lawrence caressed and fingered his slippery prostate while David reached over to massage the bulge in his shorts.

Both were so into each other that they didn't realize Mark had returned until he spoke.

"Um...should I leave you alone?" Mark asked, not sounding like he wanted to.

"No!" David whispered forcefully after pulling his mouth from Lawrence. He reached out and immediately began to caress the front of his shorts.

"Why don't you suck his cock," Lawrence whispered into his ear, "and I'll take care of your needs…"

David kissed him quickly then started to work on opening Mark's shorts.
Once he had his cock out, he pumped it in his fist.
Lawrence helped him out of his shirt and had him kneel on the bed naked as he leaned down to take Mark's cock in his mouth, as he was moaning softly.
The doctor ran his hands over his smooth cheeks, stuck his face close to his thighs and ran his tongue between his ass cheeks.
Lawrence's cock was ready to burst from his pants, so he ditched them and his underwear and knelt behind him.
As the blonde slid his cock into David, he had to refrain from moaning loudly as he felt how snug and slippery his ass was.

Lawrence eased himself all the way in until his hips were touching his fine ass, then took him by the hips and started to slowly fuck him.
As bored and desperate as Mark and Lawrence had been earlier, he had zero expectation of getting laid so just the opportunity to slip his cock into a willing ass was a bonus but David's ass was incredibly above and beyond.
From the sounds that Mark was trying to contain, it didn't sound like his cocksucking left anything to be desired, either.
Once Lawrence had a nice, steady rhythm going, he slid his hands up from his hips to touch David's breasts, feeling his hard nipples against his palms.

They all must have been pretty focused because, just as David and Lawrence hadn't seen Mark come back from parking the car, none of them realized that David's twinbrother, Adam, had discovered them in mid-threesome.

"I thought the hot doctor is for me?" he finally said and they all turned to stare at him, though David never stopped sucking Mark's cock.

Lawrence could see that Adam was drunk.
Rubbing between his legs, so he must have been turned on by the blonde attractive doctor. Even though he was fucking his twin.

"Get undressed," Lawrence answered, "I'll take care of you."

Lawrence's attention was riveted on Adam, as was Mark's, but David went back to focusing on the detective.
The blonde continued to fuck David slowly but had straightened up so he could focus on Adam's undressing.
It wasn't rare for him to watch a young man undressing but it had never happened while he was fucking somebody else.
There was enough light and his eyes were adjusted enough that he could see him start to unbutton his shirt.
Adam dropped his pants next and Lawrence could feel his cock getting even harder as he stood there in panties.

By the time he'd kicked his panties aside, Lawrence slipped out of David's ass and was standing before him.
He reached out to caress the brunette as he reached for his cock.
The bed was long enough that Lawrence was able to sit at one end and have Adam straddle him without any conflict with David and Mark.
Adam lowered himself onto Lawrence's cock while holding onto the bedsheets and, once he was fully embedded and he started to slowly ride him, the doctor reached around to caress his ass.
He was focused on Adam's ass in his hands, his pretty face in pain and pleasure in front of him and his hot ass moving up and down Lawrence's tool.

Adam's ass was equally as hot and snug as David's had been and to have his cock buried in two brothers Lawrence never experienced before.
That they were brothers and okay with fucking in front of each other was unbelievable.
Lawrence brought his hands around to caress Adam's hips again, which were probably slightly smaller than David's, as he leaned in to whisper into Lawrence's ear.

"I so needed this," he breathed, "Thank you, doctor."

Adam brought his lips to Lawrence's and they started making out as Adam continued to ride him.
The bed was starting to squeak a little as he moved faster.
When they heard David let out a gasp that Lawrence was sure indicated that he was cumming, it didn't surprise him.
After all, not only had he been apparently pleasuring himself in the car, but had already been fucked for a bit by Lawrence before fucking Mark.
Lawrence didn't turn to look, mainly because he was pretty engrossed with kissing Adam, but he did hear after another minute or so what sounded like him moving off of Mark, after hearing a soft moan out of him.

The longer and harder Adam rode Lawrence, the hotter and wetter his ass was feeling.
His hands were back on Adam's ass and he was starting to push up into him even deeper as the brunette pulled his mouth from the blonde and buried it against his neck, trying to stifle the moans.
When his furious pace suddenly turned into more like slow motion and his body was trembling, Lawrence felt a sense of relief that Adam was cumming because he knew that he wouldn't be good for much longer and he wanted him to be satisfied as it seemed that he really needed some relief just as David obviously had.

He rode out a long, intense orgasm while Lawrence just held on and waited, leaving him in control.
He didn't know whether he'd been inspired by David or not but, once he'd finished cumming, Adam climbed off of Lawrence and knelt, taking his cock in his hand.
After pumping it briefly, he wrapped his heart-shaped lips around it and slid them down.
Lawrence let out a soft moan at about the same moment he heard Mark grunt.
He glanced over quickly to see Davids's head still bobbing up and down then returned his attention to Adam.
His messy chocolate brown curls were brushing against his thighs.
Lawrence could feel his orgasm building quickly with increasing levels of pleasure, as he grasped the young mans hair.

Just a few moments later, he was spewing into Adam's mouth.
He didn't even hesitate and swallowed his load while continuing to suck out everything that the blonde had to give.
Adam let his cock fall from his mouth and sat back on the doctors lap, spitting his own cum into Lawrence's mouth.

David had resumed his spot in the middle of the bed wearing his shirt again but it didn't look like Mark had recovered enough to get his shorts back up.

"So, were Mark and I just in the right place at the right time?" Lawrence finally asked.

"Actually, I think so," David replied, pressing his naked body against Mark's under the white bed sheets,
"I was just expecting to go to bed alone tonight, taking care of myself..."

"Fortuitous," Mark said, eyes still closed, but that was it.

"Do you guys have plans for tomorrow?"

"Trust me, if we had any, we'd cancel them, angels." Lawrence assured them and Mark was winking.