Saucy math problem

Amanda is 21 years older than her son John. In 6 years from now, Amanda will be 5 times as old as John.
Question : Where is Amanda's husband?

Solution :
Amanda (A) is 21 years older than John (J). A = J + 21
In 6 years from now, Amanda will be 5 times as old as John.
A + 6 = ( J + 6 ) * 5
J + 21 + 6 = ( J + 6) * 5
J + 27 = 5J + 30
-3 = 4J
J = -3/4
John is -3/4 years old, that is, -9 months
John will be born in 9 months
So, right now, Amanda's Husband is…
INSIDE HER.