There seems to be a terrific subgenre of TnT fics - all about Trip being a great dad or great dad material. T'Pol's usually around as well and a good mother - but Trip and kids seems to go together like chocolate and peanut butter!
Just recently, we have the latest chapter of Misplaced's Unexpected Too.
We also have BlueTiger's challenge ficlet featuring Trip and Morgan, The Tracker.
And I wrote the futurefic The Little Miracle about TnT as parents.
Any other recommendations? This is just the tip of the iceberg, of course.