Danny glanced over at Flack. It was sometimes hard to remember to address the younger man by his last name. They'd been lovers for close to five years now, thanks to Jesse and Seth.

Don and Danny had become best friends almost the moment they met. Don was the first on their "team" to know about the boys. They spent so much time together, that even at the age of 8 the twins could tell there was something more between them.

So one night, they'd decided to do something about it.

"Dad, Uncle Don, can we talk to you?" Jesse asked.

"Sure, what's up?" Danny questioned.

"You may want to sit down, this might take a while," Seth said.

The two men sat down at the kitchen table, Jesse and Seth seating themselves as well.

"We have an idea about you two," Seth started.

"We think you're in love with each other," Jesse finished.

"WHAT?!" both men exclaimed. The boys were right, but Danny and Don couldn't see that their feelings were returned in the other.

"We've seen the way you look at each other, and that you seem to be touching all the time," Seth began.

The younger twin was right. At that very moment Danny and Don were sitting close enough to touch, as they usually were.

"And you both get along so well, it's just a natural step," Jesse stated.

Don and Danny took a moment to think about the implications of what the boys were saying. They each knew what they felt, but they'd never discussed it.

Don broke the silence asking, "So, are they right?"

"Yes," Danny answered with a blush.

The two boys left for their room, and the two men shared the first of many kisses.

Since then they'd had their problems, but had always come out stronger. The boys had taken to calling Don "Dad" at home. He could still remember the first time they'd done it.

They were all seated around the dinner table enjoying root beer floats. Don had just finished his and let out a loud belch.

"Good one, dad!" The boys had exclaimed, their eyes growing large when they realized what they'd said.

Don smiled at them and said, "I'm honored you think of me that way."

"You don't mind?" Jesse asked.

"Seriously?" Seth added.

"I think it's got a good ring to it," Don answered, the look on his face telling them it was really okay.

In public though, he was Uncle Don. Aidan was the only other person who knew about their relationship. They were very careful not to let on to anyone, keeping separate apartments even though Don pretty much lived in the Messer household.

He got back to work before Mac caught him, but Danny could help sneaking looks at Don and his boys. The way they interacted it was obvious they knew each other really well.

And Mac, that was another thing the boys had been bringing up recently. They wanted to actually meet their fathers' friends and co-workers. He wasn't sure what the team would think, since he'd kept them hidden the entire seven or so years he'd worked there.

Suddenly, Danny had an idea.

"Hey Mac?" Danny asked.

"Yes Danny?" Mac answered, turning away from where he was swabbing a stray drop of blood.

"Would it be okay if the boys stayed at the lab with me for the rest of the day? They're canceling school for the rest of the day, and I don't really have time to run them home right now."

"They're old enough to keep out of trouble, so it shouldn't be a problem."

Danny stood and walked over to where Don and his kids were standing.

"Guess what guys," Danny said.

"What?" the twins asked together.

"You're going back to the lab with me," Danny replied with a smirk. He knew his kids wanted to see where he worked, and now they'd finally get a chance to meet everybody.

The grins that broke out on the twins' faces made it all worth it.

Danny went back over to the scene and looked around. He caught sight of something white behind a row of books against the wall. He took a few pictures, then pulled the books out of the way revealing a foam cooler with red liquid in the bottom.

"Hey Mac, I think I found our transportation container!" Danny called to the older CSI. He picked up the container and brought it over to his kit, getting out a large evidence bag and placing the cooler in it.

"Good work, Danny," Mac said with a smile. Danny successfully tried not to react to that smile. Even now Mac's opinion of him made him nervous.

Not much later the two CSIs had gathered all the evidence they could find, and they were ready to head back to the lab.

Back at the SUV Mac and Danny stowed their kits in the back while Jesse and Seth got in the back seat.

(A/N: Tune in next week to find out what happens at the lab!)