Acts 5:8

Peter asked her, "Tell me, is this the price you and Ananias got for the land?"  "Yes," she said, "that is the price."

The sin of Ananias and Sapphira was not that they withheld some of the profits from their land sale.  The sin was that they lied and told Peter they had donated the entire amount from the sale.  Verse 1 says that Sapphira made the sale with her husband, and verse 2 says that Ananias' choice to hold back some of the money was made with Sapphira's "full knowledge".  After Ananias is caught in the lie and is punished with death, Peter gives Sapphira the chance to come clean.  However, Sapphira joins Ananias in his sin, and ends up suffering the same consequence.

While we are told in the Bible to submit to our husbands, that never means we should join them in sin.  If our husbands choose to disobey God, we may have to stand alone for what is right, perhaps even at the risk of our marriage.  But obedience to God always comes before allegiance to our husbands.