For those of you that saw the endless ads for
Life Unexpected during the Rose Parade: If you look up the actor's ages, the "mom" and "dad" would have been 12 and 13 when they had their daughter....not impossible, but not likely either, though if you go by the age of the daughter character (19 in real life, 15 on the show) then they would have been 16 and 17.
In any case - the casting doesn't do the show any favors.