Mission: Unexpected Fatherhood

Summary

My best friend's brother was discharged from the military.

Word was he got injured during a mission and lost his ability to have children.

My best friend was sighing non-stop:

"I'm happily child-free, and now my brother got injured. Looks like the mighty Hayes bloodline is going to die out with us! What a tragedy!"

A few days later, I finally met this legendary tough guy.

I was completely stunned.

How does he look exactly like the guy I slept with a few years ago—the father of my child?!