Sherlock Holmes had just picked up his 5 year old daughter from preschool, but was currently acting more a child then she was.
He had her by the hands and every few steps she would shriek "SWING DADDY SWING!" and he would lift her, swinging her up at least two feet off the pavement, a practice that Molly surely would've found quite dangerous.
As they approached 221B, Sherlock chose to simply hold her hand as they walked instead, rather than risk facing Molly's wrath. As they climbed the steps to the flat, little Hannah told him all about her day, a broad smile on her face.
They entered the flat to find Molly sitting in Sherlock's chair, looking slightly faint. Sherlock crossed the room to her in an instant.
"Molly? Are you alright, what's happened?"
"No….it's nothing Sherlock I just feel…bit dizzy….bit sick."
Sherlock felt her forehead and sighed "No fever. I'll be taking care of you Mrs. Holmes, for the rest of the day."
After an evening of Sherlock fussing about with Molly, together they went into Hannah's room to tuck her in. She looked up at them sleepily, and then asked "Mommy, when are you going to have the baby?"
Sherlock and Molly exchanged startled looks, and Sherlock said "Sweetie, why do you think Mommy's going to have a baby?"
"Because her tummy pokes out a bit and Jack Watson says that Mommy's feel a bit sick when they're going to have a baby, and also the number of those female stick you told me never to ask about in the bathroom has stayed the same, and Jack says that Mommy's only use them when they aren't pregnant."
Molly took a deep breath and then said "Alright….go to sleep, sweetheart"
She kissed her daughter's forehead, and left the room. Sherlock followed at top speed, looking at Molly "Could you….could you really be…?"
Molly smiled up at him "I was going to tell you at dinner tomorrow, when Hannah was here with Mrs. Hudson but….I'm three months along."
Sherlock laughed, placing his hands gently against her stomach and kissing her softly, the thought of another child filling him like a warm drink on a cold day.
He murmured softly "I love you, Mrs. Holmes"
"And I you, Mr. Holmes"