A/N: Sorry about the wait but thanks so much for the reviews and follows :) on we go with the story...

He finds it quite hard it keep the little wild man in one place. He sits him down with sandwich to eat, looks at his stunning wife turns back and he has gone. He looks over and sees him running towards the duck pond apparently chasing a stray duck. Castle is up and sprinting after him before Kate even realizes he is gone. She is up on her feet giving chase, as Rion gets closer and closer to the open water. She slows down and breathes a sigh of relief as she sees Castle grab him round the waist swinging him up into the safety of his arms. She walks over to them, hearing the last part of Castle's lecture to her son. Rion sees her, reaching his arms out for her. She takes him from her husband and gives him a little squeeze.

"Mumma D...cks, Dacks, Qauck Qauck."

She can't help but laugh as he tries his hardest to say the word instead making their noise instead. She brushes a hand down his cheek.

"Yes Lil man ducks, but as daddy told you, no going near the water on your own. You must wait for us, the water is very dangerous for such a lil guy. Okay you understand?"

His bottom lip quivers and she braces herself for tears. However none come instead he just nods his head at her question. She looks over to find Castle, he has gone back to the picnic area. She tickles Rion's side making him giggle and break into a smile before carrying him back to her husband.

Castle has made her a plate of food when they get back to the rug. She places her son back on his spot, pushing his food towards him ,gently encouraging him to eat. Once she is happy he is happy she takes a seat herself. She shuffles her bottom over until her leg is resting just next to Castle's. She can feel the heat of his body infuse into her skin. He places a hand on her thigh giving it a quick squeeze but his hand remains. She leans her head on to his shoulder, he places a delicate kiss to her crown.

"Thank you for being so quick Castle."

She feels him shift, lifting her head she's met by his beautiful blue orbs looking into hers.

" What do you mean Kate?"

She places her hand gently over his fingers lacing together. Even now after all these years she still feels a spark of electricity pulse between them when they touch.

"Our son, you saw him and went after him before I even registered that he was gone."

His hand cups her face, as he takes her lips in his.

"Always, but you would have seen him."

He pulls her into his side as they watch their son play with his food. Beckett is an amazing mother but she constantly doubts herself. It drives him crazy, he can reassure her all he likes but there is always that niggling feeling inside her that she is doing a bad job.

Once the picnic finished Castle packs everything back into the bag while Kate cleans up her son. He has cheese spread everywhere possible. When all the spread is gone she ruffles his hair making him giggle. This starts a tickle war, Castle is met by the sight of his wife rolling around on the grass while his son climbs all over her. It melts his heart he loves this carefree side of his wife. He grabs his son and spins him around and around before falling back to the ground with Rion laying on his chest.

"Daddy Swing, Swing Swing."

"Okay come on then lil guy let's go to the swings."

He places Rion on his shoulders, keeps a tight grip on his little legs before heading towards the play park. Kate follows him with Picnic bag. The baby swings are all in use when they get there, however Kate has a better idea. She takes a seat on a normal swing then reaches for her son. Castle passes him down to her, after making sure she has got a good hold her goes behind and gives her a push. Once the pendulum motion has started, he goes back to the front to watch the joy light up in his son's eyes. His wife's grin matches her son's as she goes back and forth. He pulls out his phone and snaps a picture. He can't wait to show it to Alexis, his mother, Lanie and the boys later. He may even get it framed for his office.

Castle takes the swing next to them as they come to a stop. He looks over at his son.

"Hey Little man do want to hear a another story?"

Rion claps his hands together which Castle takes as an approval of story time.

"Well 4 short years ago, mummy and daddy came to these swings after a slight disagreement. Mummy was offered a new job in a faraway place called D.C. Now mummy thought daddy was going to break up with her, but really daddy had a big question to ask. Daddy had decided that he loved mummy that much that he would follow her anywhere. So daddy got down on one knee much to mummy's surprise, and asked her to marry him. Now mummy said yes, so we got married then a year later we had you. The end. "

Kate has tears in her eyes at the memories, Rion notices his head goes to the side.

"Mama sad?"

"No sweetie happy tears for a happy memory."

She kisses him on the cheek before pulling Castle's swing towards hers. Rion ends up sandwiched between his parents, he doesn't seem to mind though. Castle pulls back.

" Lets go home we have a meal to prepare for when our daughter come round."

A/N: Thoughts?