Unfortunately, Grey's Anatomy and its characters don't belong to me, but below is a story that I wrote based off of the show, which you hopefully enjoy.
Meredith and Derek were the absolute picture of love especially since they found out three months ago that they were expecting a baby. All Meredith's fears about being a good mother were cast aside the moment she knew about the tiny life inside of her, because instantly she felt nothing but love for it. She and Derek had kept the baby a secret from everyone including Christina since they found out, trying not to jinx the first trimester after what had happened last time. Now that they were in their second trimester they were ready to shout their news from the roof tops. Coincidentally their new house had been finished just under a week ago and they planned on throwing what they were calling a "house party" on Saturday for all of their close friends and family, and it would be there that they would break their good news. However, not wanting Christina to be hurt by finding out with everyone else, Derek had agreed that Meredith could tell Christina before the party, so eagerly the morning before the party Meredith begged Christina to go shopping with her for the party so she would have an excuse to tell her.
Christina wasn't much of the shopping type so Meredith basically had to beg Christina to go down to Pike Place Market with her. "I don't understand why we can't just go to some superstore and get everything we need in one spot without walking through half the city." Christina whined as they pushed their way through the crowds of tourists gawking at the flying fish in Pike Place. "I seriously think my feet are sticking to the floor with all of these fish guts." Christina complained as she slipped a little on the concrete floor, looking down in disgust. "Come on Christina, this is the best place for fresh flowers!" Meredith replied as she spotted her favorite flower vendor. "Since when have you cared about 'fresh' flowers?" Christina asked glaring at Meredith. "Like I said, superstore, they have flowers, food, and no tourists!" Christina exclaimed as another person bumped into her. "I've cared about fresh flowers since this is a special night." Meredith hinted. "As I recall at your last house warming party we didn't need fresh flowers we needed lots of tequila." Christina chided. "Three heads Christina!" Meredith whipped around to say jokingly slapping Christina's arm. "I know I know! You're no fun now that your trying for a baby." Christina said, not really meaning it but trying to rattle Meredith. "We're not 'trying' for a baby anymore." Meredith said before she quickly turned around to hide her telltale grin. "Yeah well…wait what?" Christina asked just now realizing what Meredith had said. Meredith turned around glowing, "We're not trying to have a baby anymore, we are going to have a baby!" Meredith said tears starting to form in her eyes. It had been nearly impossible to keep this pregnancy from Christina, and she had wanted to tell her about it the moment they found out, but she had to keep herself under serious restraint from bursting out their little secret. "Mere that's amazing!" Christina said pulling Meredith into one of her rare hugs, tears now also present in Christina's eyes. "How far along are you?" Christina asked suddenly forgetting about the numerous people bumping into them and her feet sticking to the floor. "About 4 months now." Meredith said a little nervous about Christina's reaction once she found out that Derek and Meredith had been keeping it from her for this long. She didn't have to worry about it though because without saying anything Christina knew why they would just want to keep it between them until they were somewhat out of the woods. "I'm still going to be the godmother right?" Christina asked seriously. "Of course you are!" Meredith said so happy to see her 'person' overjoyed at their news. "Wait a second this isn't just some house warming party is it? This is to trick everyone into telling them about the baby isn't it?" Christina asked catching onto their plan and realizing why fresh flowers and all of this stuff from Pike Place that they were after was so important to Meredith. "You found me out." Meredith said coyly as she started to pick through the various flower bouquets again. "So how do you plan to break the news to everybody?" Christina asked curiously knowing that they must have something up their sleeve. "Well actually I was going to tell you about that, you're sort of a key part to our little plan." Meredith said hoping that Christina would agree to the sneaky plan. "I refuse to do anything with baby items or pregnancy tests." Christina informed Meredith before hearing the plan. "Good it doesn't have to do with any of those things, the plan is…"