I think that if there is marriage in Heaven, it is not "marriage' in the sense that we understand on earth, where a man and a woman who are "in union" set up housekeeping and sleep together.
I think of "marriage" in heaven is the believer's spiritual union with God and state of communion with other believers.
I think the Sadducees were just being pricks who were tyring to sound smart. That's kind of what they did.
"Our past is a story existing only in our minds. Look, analyze, understand, and forgive. Then, as quickly as possible, chuck it." ~ Marianne Williamson