In your Collegiate case, I'd go with 

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if I spent a few years there learning magic instead of how fast the Main Character of this game picks up magic (by just eating spell tomes)

Maybe that was where you learned how to eat spell tomes to gain the spell? ?

If your is of a long-living race like the Dunmer, go for time-skip.

If it is a normal human, skipping 10 years or more (ingame children 9 - 13 years old?) might have a bad taste for some gamers.

Using the 3rd option would be lazy writing.

I see a few ways how this could be done:

1. Tell the story until time of birth. End one story arc there, with your pc retiring. Skip x years, after which plot happens and Destana get's back into her old life.

2. Like the first, just that Mini-Destana get's kidnapped right after birth. And now the quest is to find her again.

3. Move Mini-Destana into some magical realm after being born (for safety?), where time flows differently i.e. 1 month in nirn = 1 year there. Since your pc is already involved with a deadric prince, I would consider this to be not too outlandish.

 If we go with what's suggested at the end of the last post, as to who the father is, then all bets are off anyway, as to how long your pc's child would need to grow up.

Just my two cents.

Excellent ideas here.  You guys are great.