It took everything Derek had not to lecture his grown ass baby sister in front of everyone. But Derek knew if he did that, then Penelope would certainly couch his ass for the night if not two.

Derek sighed and turned back to the grill.

Hotch looked in Derek's direction and immediately frowned. Hotch wondered, "Who the hell the asshole standing next to Prentiss was?"

Immediately Aaron blanched. He mumbled something to Derek about not over cooking the steaks.

Penelope looked at the girls and said, "Well this is going well."

Des snorted and said, "Yeah….well my brother looks like he is going to murder someone."

Derek was not happy about this at all. There had been several times before he started dating his baby girl that Mick Rawson and Derek Morgan prowled for women together. They had the wingman thing down.

Mick and Derek had an unspoken bond, that everyone in a while they would take one for the team. They were both shameless flirts. They would flirt with the average housewife, to trying to charm the pants off supermodels.

Mick and Derek treated finding women like a contest, albeit a fun contest, that resulted in sex, and in both men's book that was fanfuckingtastic.

Now here the very man who competed with him to bed the entire east coast had his arm around his little sister.

Penelope was right, Karma was a bitch.

Derek was broken out of his thoughts by a small hand tugging on his shirt.

Jack Hotchner looked wide eyed at Derek and said, "Uncle Derek the ducky float broke.

Derek smiled down at Jack and said, "No worries lil Hotchner, it looks like your Aunt JJ is putting Henry down for a nap. You can use his float."

Jack sighed but said, "Okay."

Jack turned and went back in the pool.

The girls and their dates made their way over towards Rossi, Reid, Hotch, and Morgan.

Penelope tapped Derek on the shoulder and said, "Baby aren't you going to say hi to your sister."

Derek grumbled but turned around.

Derek gave a tight lipped smile and said, "Hello Desiree."

Penelope cocked and eyebrow and Emily laughed.

Hotch glared at Emily.

Emily took a step back.

Stephen placed his hand on the small of Emily's back to steady her. The action did not go unnoticed by Hotch who gruffly said, "Derek I need some water. Reid can you keep an eye on Jack."

Spencer nodded his answer, he couldn't seem to find his voice due to all the tension radiating off the people he was standing next to.

Desiree looked at Derek and said, "I am sorry for not telling you I was in town. It's…..it's just that I…"

Mick noticed the uneasiness of this entire scenario.

Derek coolly said, "Des you are a gown up now. You don't have to tell me everything."

Penelope knew Derek was about a second away from blowing a gasket, and what the hell was up with the look on Hotch's face just a moment ago.

Mick said, "Look if this is going to be an issue, I can just go."

Des replied, "Don't you dare."

Derek said, "Whatever."

Penelope said, "Derek when you get a moment I need to speak with you."

Rossi hung back and watched. He knew that Derek Morgan was about to be cut off at the knees by Penelope. IT was all he could do not to laugh.

Stephen, Mick, Emily, and Des sat around in lounge chairs.

Mick laughed and said, "Well that went well."

Des sighed and said, "Look Mick I know we have only been dating for a short time….."

Mick looked at Des and said, "Dating, I thought we were just having fun?"

Des asked, "You what?"

Mick shrugged his shoulders and said, "Yeah.. I guess…Shit. Des I am sorry."

Emily looked at Mick and said, "Sorry for what? Being an as."

Stephen looked at Emily and said, "Hey now that was uncalled for."

Meanwhile in Derek and Penelope's living room.

"Derek Morgan what is going on with you?"

"Penelope I know guys like Mick. That man is a bigger player than I was."

Penelope raised her hands and said, "Derek don't you think I know that. I have worked with the man. And let me tell you…Nevermind."

Derek grounded out, "Tell me what Penelope?"

Penelope sighed. Why she had opened her big damn mouth was beyond her.

She sighed again and said, "Mick and I use to flirt sometimes over the phone. Not like you and me…Derek… I.."

Derek looked hurt.

Derek asked quietly, "Did you ever let him call you baby girl?"

Penelope looked into Derek's dark chocolate eyes and said succinctly, "No way in hell. He tried once, but I cursed him out so loudly that Sam banned me from speaker phone. He apologized later for it, but we never flirted again."

Derek hugged Penelope and said, "Mama I will try and get over this, but I swear to God if that smug English bastard hurts my sister…."

As if on cue Mick came storming through the house with his brother in tow.

Mick looked at Derek and said, "Man you do not have to worry about me."

Derek asked, "What did you do to my sister?"

Mick sighed and inched his way towards the door while saying, "Derek I didn't know she was your sister until after we met. I thought we were just having fun, she assumed….."

Penelope pointed a finger at Mick and said, "You should have made sure that was clear."

Penelope placed her arm around a fuming Derek and continued speaking by saying, "Now get out, before I let Derek kill you. And by the way Mick, Des is too damn good for you anyway."

Mick and Stephen left.

Derek smiled down at Penelope and said, "Thank you mama lion."

Penelope chuckled and said, "Derek Morgan you must think I am stupid. The only reason you didn't say anything is because you didn't want to get couched."

Derek swatted Penelope's butt and said, "Damn straight."

Penelope in a serious tone asked, "What are we going to do about Hotch and Emily?"

Derek tilted his head and asked, "What about Hotch and Emily?"

"Good lord men are slow. Never mind I'll talk to JJ about this one."

Derek said, "Yeah I think you should go with JJ on this….Oh shit."

Penelope asked, "What?"

"I left Reid and Rossi alone with my grill. Reid has probably jammed every inch of that meat with a thermometer, and Rossi probably put some funky Italian seasoning on my steaks."

Penelope rolled her eyes and said, "Well we can't have that now, can we?"

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