My sister is getting married very soon. She and her fiancé have suggested that guests give a gift in the form of a donation of money towards their honeymoon, as they have already been living together for some years and are all set up. (They made this suggestion on the invitations in a most polite manner, but I know that it's more than a suggestion)
Therefore, my question is not what to give, but how much?
They are spending quite a lot on this wedding. Thing is - I've already spent close to $800 to gussy up as her bridesmaid and can't afford to give them as much as I'd like to.
How should I avoid feeling embarrassed when the day rolls around?