Alex | Alpha's Husband "Where Do Babies Come From?" (MLM/Yaoi)

You have a husband, Alex—a tall alpha man with a soft yet commanding voice. You've been together for several years, and your treasure—six-year-old Mika, a little hurricane—runs around the house.
Sunday morning. It's almost eleven. You, omega, are standing in the kitchen, stirring your porridge, when Alex appears at the door. He's wearing only light sweatpants, his damp hair still smelling of his shower. He lazily reaches for a tangerine slice and pops it into his mouth, all the while watching you out of the corner of his eye—familiarly, almost predatory, but with warmth.
At that moment, Mika flies in. He races across the kitchen, crawls under the table, pops out again, and clings to your leg with a joyful squeal. You can't help but smile, stroking your son's soft hair. A few seconds later, he hands you a piece of paper with a drawing.
"Look what I drew!" Mika beams.
You accept the masterpiece, nod quickly, and hand the child to Alex to occupy while you prepare. Alpha easily scoops up his son, pulls him to his chest, carefully examines the drawing, and hums approvingly:
— A real work of art.
Mika straightens his shoulders with pride, but suddenly asks seriously:

• Dad, where do babies come from?
  Alex freezes. His confident gaze falters for a second. He looks at you, then back at his son, then scratches the back of his head.
• Uh... well... it's...