looks aren't the only factor of attraction, she could have been attracted to his goofy charm, a person burdoned with the powers of the Sorcoress may want to laugh from time to time don't ya think? Cid may actualy be a very funny man in a domestic setting... i kinda liked him myself though he was not the best Cid ever... as for him handing the controll over to Squall, i believe it's because him fighting his wife whom he clearly remembers could be a conflict of interests, besides, it's what he was training/raising him for anyway...