The day J.J. realized how much Dave was like a dad to her was when he had planned her wedding in a day. Will had proposed and like any father he wanted her wedding day to be special and a courthouse wasn't what he had in mind for his daughter. The first person Dave had called after Will had proposed was a caterer. After that he called a florist and a few designer friends of his and the wedding had practically created itself. After all the preparations were well underway he called her mother and let her in on what was going on. Dave immediately paid to have her flown in overnight with the dress.

What really did it for her though was when Dave walked in the room right before she was supposed to go down. Her mother had left a few seconds ago and after talking to her for a moment Dave had gone up to see J.J.

"You ready?" he asked her with a soft smile.

"More than ready," she told him as she turned around from the mirror she had been admiring the dress in.

"I heard you don't have a something borrowed yet…" Dave said becoming serious.

"I do actually, did mom tell you I didn't?"

"Yes she did but not in the way you're thinking. I was wondering if maybe I could be your something borrowed."

Jennifer looked up at him now, his suit was impeccable and his eyes soft as he watched her.

"What do you mean?" she asked as she studied him some more.

"I was thinking you could borrow me to walk you down the aisle," Dave told her as he watched carefully for how she would take the suggestion.

"You want to walk me down the aisle?" J.J. asked as tears started to collect. Dave wanted to give her away, wanted to step in as a sort of surrogate dad and give her away. Oh great now my makeup is ruined, she thought as the tears started to flow.

"If you'll have me that is… J.J. you've become like my daughter and I would love nothing more than to be the person who walks you down the aisle and gives you away," he told her sincerely as he went to hand her his handkerchief to dry her eyes. What he got was an arm full of a crying bride as she continuously told him she'd love nothing more than for him to be the one to give her away.

"What happened?!" Emily came rushing in with Penelope in tow.

"Oh no, honey you're make up! David Rossi!" Penelope rounded on him once they'd gotten J.J. out of his arms and into a chair. "What did you do to make her cry?!" she interrogated him.

"He-he's going to walk me down the aisle," J.J. got out as a fresh wave of tears hit her.

"Well okay I guess you're off the hook for now," Emily told him.

With that he was ushered out of the room quickly as they had to redo her makeup fast. About ten minutes later J.J. walked out of the room with her two friends in tow.

"You ready?" Dave asked as he offered her his arm.

"More than ready," she smiled as she took his arm. It felt right having him walk her down the aisle, he was like her dad and had always been there for her. He was really like the entire team's dad if she was honest with herself. Spence looked up to him, Morgan looked to him for advice every time some was needed, Emily was almost like the eldest daughter to him, Penelope despite calling him sir all the time considered herself to be like his daughter, and Hotch while they were good friends was still like a son to the older profiler.

As they made their way down stairs and to the backyard Dave reflected on how much the young woman on his arm had grown over the years. He couldn't be more proud of her, she was a wonderful mother, a beautiful bride and was going to be an amazing wife. He was grateful that she had Will to be there for her when she needed it. He was good to her and for her treating her the way any gentleman should treat a lady. J.J. was strong and Dave had no doubt in his mind that she could take care of herself yet knowing she had someone gave him peace of mind that when the day came that he was no longer there, she would have someone to lean on.

They walked out to the backyard and J.J. couldn't help the wonderful feeling of happiness that overcame her as Dave walked her to her future. She watched Will with a small smile as she approached her soon to be husband. Dave let her go once they'd gotten there and left to join the others but she could still feel him watching her with the sort of pride that a father could only have for his daughter.

A short while after the ceremony and well into the dancing J.J. watched as Dave approached her dancing with Will.

"Can I steal her from you for a dance?" he asked with a small smile.

"Of course," was all Will said as he kissed her and left to get a drink.

"May I have this dance?" Rossi asked her as he offered her his hand.

"Of course," she told him as she took his hand.

A new song started to play, it was the song "I loved her first" by Heartland and although he hadn't raised the woman before him, Dave couldn't help but think it was appropriate. J.J. must have agreed because she laid her head on his shoulder and sighed, content at the moment.

"Jennifer, I want you to know that I'm always here if you need me," Dave spoke after a moment. He paused though a bit overcome with emotion for a moment as his heart felt like it was being squeezed as he listened to the lyrics to the song.

"I know Dave," she said smiling as she looked up and watched him. Tears had formed in the corners of his eyes and it made her feel just as emotional. "You can't cry Dave because if you cry then I'm gonna cry and my make up will be ruined again," she warned him softly.

"I know but I'm just so proud of you."

They danced till the song ended and then Will came to dance with his wife once more and Dave left to dance with Erin again.