I know it's rude, but this thread nearly made me burst from holding my laughter in (I'm in school now). I could literally envision your looks of discomfort while reading this.
David Eddings was probably just emphasizing how perfect Polgara looked - possibly to endear her to readers, seeing as how bossy she can be at times - through Garion. Garion's characterised as an objective and observant boy, so he serves as our seeing eye guide through his adventures in the Belgariad and the Mallorean. I highly doubt there's anything to his admiration of Polgara's beauty. Even her father remarks about her beauty quite frequently in his book and the two series...no...no, don't even think about it.
I remember telling my brother several days ago how Zandramas was designed to be the anti-thesis of Polgara by David and Leigh Eddings. He then calmly replied that that suggests a parallel in the relationship between her and Geran, and Polgara and Garion. Obviously, Zandramas, the caretaker of baby Geran, chose to regard the latter as her husband. Polgara on the other hand, the caretaker of baby Garion, chose to be the latter's guardian and mother. My brother then concluded that in a twisted way, it might have been hinted that Polgara's and Garion's relationship could have turned out quite differently. This is probably going to gross a lot of you out, but Garion did propose to Polgara when he was just a little boy. You may argue and say that he was just a little boy spouting rubbish, and I would completely agree with you, but it still happened...and that's open to interpretation.
I was apalled by this, but it does make sense...in a twisted sort of way. Still, I'm going to just forget it and pretend that it never happened. Ha ha.