Just another of my fluffy one-shot ideas. I love fluff

I do not own The Mortal Instruments, it belongs to Cassandra Clare. Please review.

-Hum, Clary? –Jace called. The baby boy that laid in front of Jace let out a little giggle, and held up his legs with his tiny little baby fists.
-What is it Jace? –Clary asked, showing up by the door. Her red hair was caught in a messy bun, and she held a bottle.
-I kind of need your help. –He said. The baby took Jace's hand, staring at the voyance rune his hand.
-Really Jace?- Clary put a hand on her waist. –Six months and you haven't learned that yet?
-Yeah. I`ve tried, but it`s too hard. –The little boy laugh, making Clary laugh too.
-See, even Christopher finds it funny. Get over there. –She said, pushing Jace to the side, and handling him the bottle. Christopher made a babbling sound and placed a fist into his mouth.
-Can we change assignments? I know how to heat a bottle. I just can't learn how to change a dipper.
-Wasn't you the one that said that there wasn't anything that Jace Lightwood couldn't learn?
-Well, that was before I tried changing dippers. –He said, leaning into the wall. He started to make funny faces, making the little boy burst into laughter.
-Jace, don`t do that. –Clary said, trying to hold the laughter herself.
-Why? –He asked, sounding like a five year old that was told to stop playing with his toys.
-Cuss I`m trying to change his dipper and he won`t quiet down with you making faces.
-Exactly! He don`t quiet down. How do you expect me to learn it? –He asked, crossing his arms in front of his chest.
-You`re overreacting Jace. Have you tried putting him to sleep? THAT is hard.
-Of course I have. –He said, in a fake offended voice. –And I don't think so. He sleeps so easy.
-Ok Jace. –She said, finishing to close the boy`s dipper, picking him up.
-How did you do that? –He asked. –I haven`t even seen you…
-Well, if you were paying more attention to it, instead of making faces, you would have seen it. -She said, kissing him softly in the lips, and handling the baby to him. –Could you give him the bottle? I`m going to make some coffee.
-Don`t you think is a little late to drink coffee? -He asked, while Christopher clapped his hands happily.
-No actually. Do you want something? Tee? –He nodded, and she left the room.
-See there. –Jace said, laying the baby in his arms, and putting the tip of the bottle in his mouth. The little boy sucked the bottle calmly, looking at Jace with curious emerald green eyes. –Sometimes mommy is much smarter than daddy. But don`t tell her I told you that. -The baby finished the bottle, letting out a burp. –Ok, time to sleep.
He started rocking the baby one side to another, humming a little melody. He didn`t ever need a grace rune for that. In a couple of minutes, Christopher was already asleep.
Clary came back a few moments later, holding one mug in each hand, and looked surprised at Jace, with the sleeping baby on his arms.
-Ok, now how did YOU do that? –She asked, while he placed the baby into the cradle.
-Why, thought I couldn`t do it? –He joked, taking one mug, and pulling Clary by the hand to their room.
-He never sleeps so easily with me. –She complained.
-Some people are better in changing dippers, the other are better in putting the baby to sleep. –He said, taking the other mug from her hand, placing both of the mugs in the dresser and putting his arms around her waist.
-You just admitted I`m better then you in something? –She asked, a fake surprise ton in her voice.
-Probably, yes. But if you ever tell that to someone, -He said, kissing her cheek. – I will deny it until death.
She laugh, placing her arms around his neck and kissing him.
-Yeah? I don`t think that will be necessary. Are you going to put me to sleep now? -She asked, making a sweet voice.

-Hum, sleep? Really? -He anwsered making her laugh, and pulled him down, his lips to her's.