Keep reading, reviews are welcome. Sorry if it took a while. I got stuck.
"what?! How is that even possible?" Lestrade jumped up in anger and surprise. Holmes pushed Watson aside and studied the results. "it's gotta be fake! Watson if this is a prank on your part..." she pointed an accusing finger at him. "I assure you it is not." Watson said, hands up in surrender. Holmes stepped away in shock, "it's true." Lestrade looks at the DNA sample. Holmes wanders to a chair to sit but as he leaned on it, his arm weakened and buckled under him. His ungraceful landing pulled their attention. "Holmes are you alright?" Lestrade was beside him in two strides. "yes, I'm fine." he allows her to help him up. "you know, for the worlds greatest detective you are a horrible liar. What happened?" he looks at her, "my hand slipped." she frowns, "obviously." she lets go as he sits. He quietly contemplates their situation. Watson watches Lestrade grab her coat. "where are you going?" "out!" the door slams behind her.
Normally if something ticked her off she would bury herself further into the case but now it was the cause. Most people go somewhere quiet to think, maybe she could try that. "somewhere quiet? Where could I find somewhere quiet?" she asked herself while jerking on the steering wheel. Several vehicles swerved out of the way. She decided on the Thames bridge. The only place quieter was the library and that place bored her to death. She stares at the murky water. "me and Holmes?" she makes a barfing face. "how is that even possible? He hasn't been alive again long enough for him to have a kid, much less a teenager. At least she might have been a teen. And me, did someone steal my... our DNA to make this kid? That's it! The only explanation! Why didn't I think of this before?" she smirked to herself as her wrist communicator beeped. She pops it open to see Holmes' face. "glad you called. I figured it out, it's.." he cut her off, "time travel." she frowns, "I was going to say that she's a genetic experiment." He smiles, "perhaps you could ask her yourself." a faceless person appeared on the screen. She shook the shock off and bolted for her car.
Lestrade slammed the door open and slid to a stop on the rug. She pointed a finger at the visitor, "ANSWERS, NOW!" Watson calmly sat the inspector down and handed her a cup of tea. The girl pulled off her rubber mask to reveal a beautiful face with intelligent blue eyes. "my name is unimportant. I am your daughter from the future. My DNA has already confirmed that. Your future self has sent me to foil a plot by Moriarty and his son." Lestrade interrupts, "wait, Moriarty has a son?" she sighs and continues, "yes, he is my half brother. I will start from the beginning. Three years from now Moriarty will kidnap Lestrade and go into hiding. He will wipe her mind of all it knows and make her believe that she is his wife. After several months Holmes and Watson will rescue her and return her memory. In the attempt Moriarty's house will explode and he will become a cripple but believed dead. A year later you two got married and I was born. Andrew takes after his father in intelligence and skill but he is hot headed and impulsive. His plan is to kill Holmes so Moriarty will succeed. Any questions?" Lestrade and Watson look at her with shock, Holmes, only interest. "do you know his plan or how to stop him?" she thinks, "no, all I remember is that it fails, sorry." she puts the mask back on, "I'll take down Andrew. You stop Moriarty." she stands, pushes buttons on her wrist band, and disappears.
How you like? More to come.