Temperance Brennan sat in her bed one evening, propped up by several large pillows as she thumbed through her latest copy of the American Forensics Journal. She glanced at her night table to make sure she had everything she needed for the April Fool's prank she had planned for her husband. She giggled quietly as she turned the page, knowing that her improved acting skills would be necessary if she was to succeed in convincing her husband that she was telling the truth. As she heard her husband open the bathroom door, she pretended to concentrate on an article in her magazine.

"What'cha reading there, Bones? You look pretty intense." Booth turned down the comforter and sheets before sitting on the bed. He fluffed his pillow as he tried to see what was on the page. "Non-chemical defleshing techniques. Yeah, just what I'd like to read before going to sleep. Come on...it's time to put that magazine away and pay attention to your lovin' husband…"

Sighing softly, Brennan avoided her husband's gaze as she lay her journal aside. "Actually, even though the article is interesting, I haven't been able to concentrate on it as much as I might like." She paused as his hand started to work its way across her body towards her breast. "Booth, there's something I need to tell you…"

"Jesus...way to kill the mood, Bones. You know I hate it when you start a conversation like that…" Booth rolled over on his back and crossed his arms across his chest as he stared at the bedroom ceiling. "Okay...let me have it. What's wrong now? Did you dent the car's fender? Did Christine get an E- in art again?"

"No, it's nothing like that. This is about something much more important…" She turned to her nightstand and picked up a white object. "Look at this…"

"What the hell is that? Oh...wait...is that...is that what I think it is?" Booth looked at the small white stick and then at his wife. "You're pregnant?" Thoroughly shocked, he was speechless for a minute. Finally he came to his senses enough to begin a barrage of questions. "How did this happen? Didn't you say you didn't want another baby? Aren't you on the pill? How far along are you? Wow...another baby? Hank's not even two yet…those two kids are gonna be close in age, aren't they?"

"I think you must know how this happened, but I admit that I was as surprised as you are now. I am on birth control, but as we both know, your semen is quite remarkable, and we have been very active sexually over the last few month…" Brennan smiled at her very proud husband. "I'd estimate that I'm 6 weeks pregnant…"

"Wait a minute...six weeks?" Booth frowned as he counted the weeks in his mind. "I was out of town for a week six weeks ago. Are you sure you figured right? Maybe it's closer to eight weeks…"

"I believe it's closer to six weeks. My cycle is very predictable…" Brennan stared at the white stick and bit her lip to keep from laughing out loud. "Let's see...six weeks ago...that's right. You had to go out of town right after Valentine's Day...and now here we are...six weeks later, on April 1...also known as April Fool's Day…"

"What? April Fool's? Jesus, Bones...you really had me going there a minute, didn't you, you little minx?" Booth twitched his eyebrows at her, laughing with his wife as he tried to figure out a way to pull off the trick he had prepared on her. "Actually, I was surprised to hear you were six weeks along. I was thinking it was actually too early to tell…"

"Tell what?" Brennan gave her husband a startled look. "To tell that I was...pregnant? I'm not pregnant, Booth…"

"Well, at least you hope you're not." Booth chuckled at her stern glare. "I mean, it's okay if you are, because, you know, being Catholic and all, I don't mind having a big family with lots of little kids running around the house. Anyway, you're not the only one who keeps track of your 'cycle', you know?" He ducked away from her jabbing fingers. "Remember that night a few weeks ago, when Christine was at the Brownie overnight lock in? We put Hank in bed for the night, and we sat by the fire and drank that bottle of Merlot Aubrey gave us? Remember what happened next?"

"Yes…" Brennan smiled and licked her lips as she grinned at her husband. "We made love all night long on the living room floor...it was very romantic, wasn't it?"

"It was very romantic...it was so romantic that my sniper went unbagged for the whole entire evening, remember? And if I was lucky, I might just have hit my intended target, and you might really be pregnant…" Booth chuckled as his wife turned pale. "You've been taking your pills regularly, right?"

"Yes, of course…" Brennan rose from the bed and went into the bathroom, returning with her package of birth control pills. Obviously nervous, she held out the package to her husband. "This can't be right...I have two extra pills in this package. I know I didn't skip two pills! Booth! Why are you laughing? I could really be pregnant! We could have four children...two of them in diapers at the same time!"

Booth sat back and watched the show, letting his wife fret for a few minutes. Finally he took her hand in his, laughing as he tried to get a word in. "Bones...relax." He laughed at her scowl. "You didn't miss any pills. Look...these are baby aspirin, okay? The doctor at the FBI clinic suggested that I take one a day because of the heart disease on my mother's side, remember? I just slipped them into the empty slot, see?" Wearing a big Boothy grin, he reached out to tickle her. "April Fool's!"

"That's not very funny, Booth!" Brennan pouted a little bit as her husband reached over and pulled her close. "After all the intercourse we engaged in that night, I really could be pregnant."

"Nah...I knew where you were in your cycle, Bones." Shrugging at her surprised expression, he continued. "I've known you for twelve years, right? I've spent a lot of time with you, and I've learned how to tell when you're ovulating. You said yourself you act different, and it's true. If nothing else, you're a lot more affectionate...I mean, a lot more...like wear me out more affectionate. Anyway, it's also good for me to know so that I can figure out whether or not it's a bag free night..."

"I see." Brennan smiled demurely. "So what about tonight? Bag or no bag?"

"After the scare you gave me earlier this evening? Maybe double bagging would be best, right?" Booth grinned as he rolled over on top of his wife. "Nah, it's a no bag night. Who cares if you're ovulating? Maybe it would be fun to have another kid…"

"Booth!" Brennan shook her finger at her husband. "Three children is enough! You said so yourself. You said our family was perfect the way it was."

"Oh, okay...you're right. No more kids. I promise." He bent down and kissed his wife passionately. As he gazed at her beautiful face, he laughed to himself. "Or maybe I don't promise. We'll see. April Fool's!"