"About three hours later his wife came in, not knowing what had happened. Peter asked her, 'Tell me, is this the price you and Ananias got for the land?' 'Yes,' she said, 'that is the price.'" NIV translation
Isn't it great that each of us only has to answer for our own actions? You see, just like God, Peter knew the truth without asking Sapphira. Ananias had earlier received his punishment but she was still given the opportunity to tell the truth.
"Peter said to her, 'How could you agree to test the Spirit of the Lord? The feet of the men that buried your husband are at the door, and they will carry you out also.' At that moment she fell down at his feet and died. Then the young men came in and, finding her dead, carried her out and buried her beside her husband. Great fear seized the whole church and all who heard about these events." NIV translation
For agreeing with Ananias to lie to the Spirit of the Lord, Sapphira died as well.
This passage goes on to tell us that, because of these events, great fear seized the people. This healthy fear is really respect and awe in that they knew that God could see into the hearts of men.
These wolves had tried to undermine the church by making people believe that they could hide their sin from God. If you believe that you can hide sins from God, then, you do not know God and cannot trust in His payment for those sins.
"The apostles performed many miraculous signs and wonders among the people. And all the believers used to meet together in Solomon's Colonnade. No one else dared join them, even though they were highly regarded by the people." NIV translation
In this passage, we are told that the believers gathered at Solomon's Colonnade. This was a porch on the east side of the temple in Jerusalem. It was a place where they gathered to discuss the Word of God. It was sort of like what we would call a small group Bible study. We are told that others didn't dare to join them and this is talking about non-Christians. They did not join them for the talk about Jesus because they had heard about the punishment for being a pretender (wolf in sheep's clothing).