what act, in the woods, did abigail do that she did not admit to parris?why did she do it?

Abigail does not want to admit dancing naked in the woods because it elevates their "devil worship" to a whole new level. She tries to convince Parris he did not see what he thinks he saw. The reader also knows that she wanted a curse put on Goody Proctor and that she wants John Proctor to love her.