Is Lady Macbeth aware that Lord Macbeth killed Macduffs' family. If no, then I need a quote to prove Lord Macbeth did not inform her(if there is one)

I haven't read this play, and apparently others here haven't either.

Here's the best website I've found to help students read Shakespeare's plays:
http://nfs.sparknotes.com/
Click on the title of the play you want, then click on the act and scene. You'll find original Shakespearean language on the left and a modern-day "translation" on the right.

Here are several other really good websites about Shakespeare and his works and his times. Be sure to add ALL THESE to your favorites so you can find them again.

http://shakespeare.palomar.edu/

http://www.shakespeare-online.com/

http://www.bardweb.net/

http://www.enotes.com/william-shakespeare/

http://www.sparknotes.com/shakespeare/

To determine if Lady Macbeth is aware that Lord Macbeth killed Macduff's family, we need to analyze the events in Shakespeare's play, Macbeth. While there is no direct evidence in the play that explicitly shows Lady Macbeth being informed about the murder of Macduff's family, we can analyze a particular scene to support this observation.

In Act III, Scene 2, Macbeth has a conversation with Lady Macbeth about their future plans and the aftermath of Duncan's murder. During this conversation, Macbeth says, "Be innocent of the knowledge, dearest chuck" (3.2.45). This indicates that Macbeth intends to keep certain details hidden from Lady Macbeth. Although he does not explicitly mention Macduff's family, the use of the phrase "innocent of the knowledge" suggests that there are specific actions or events he does not want Lady Macbeth to know about.

This quote indirectly suggests that Lord Macbeth intentionally chooses not to inform Lady Macbeth of certain actions he has taken, which may include the murder of Macduff's family. Therefore, it can be inferred that Lady Macbeth is not aware of Lord Macbeth's involvement in the murder of Macduff's family based on this scene.