cheat or deceive anyone, but he does want something that isn't his (and there's no way to get the throne without doing something deceitful).  He's just a little too nice for her taste.  So, she beckons him home, and she seems confident that she can manipulate her husband, "pour[ing] [her] spirits in [his] ear" so that she can convince him how easy it will be to take the thing he wants (1.5.29).  Evidently, she finds him fairly easy to control.

When Macbeth does arrive home, Lady Macbeth seems a bit concerned that he might give everything away by neglecting to act and look innocent.  She reminds him, "Bear welcome in your eye, / Your hand, your tongue. Look like th' innocent / flower, / But be the serpent under 't" (1.5.75-78).  When he suggests that they'll need to speak further about their plans to kill Duncan, she assumes control, saying, "Leave all the rest to me" (1.5.86).  In other words, she just wants Macbeth to focus on pretending everything is normal; she will do all the heavy lifting in terms of plotting and planning.  This makes it seem like she feels that he is a little unreliable; she wants to retain control because she doesn't seem to trust him to get everything right.  

(And, to a certain extent, she's correct about him.  As we see in the next act, Macbeth has trouble keeping it together.  He forgets to leave the murder weapons in the room with Duncan, and then he refuses to return them.  He panics about not being able to say "Amen" or sleep peacefully again.  She's also more than a little wrong about herself and what she can handle, too, as we see much later in the play.)

Lady Macbeth's attitude toward Macbeth in Act I is of love, but a lack of respect. She describes him as

"fear[ing his] nature;
It is too full o’ the milk of human kindness(15)"

thus justifying her desire to "unsex" her. She feels that Macbeth's goodness will stand in the way of pursuing the witches' third prophecy -- which is to have Macbeth become king. She clearly believes that the only way to obtain power is through "foul" means, which, according to her, Macbeth doesn't possess, as can be evidenced when she states:

Art not without ambition, but without
The illness should attend it.

When Ross tells her that she must "have patience" with her husband for not coming home immediately, she angrily responds that "he had none" / His flight was madness. When or actions do not,/Our fears do make us traitors." Even when Ross further advises that her husband might have "fled" out of "wisdom," she decries "Wisdom!  To leave his wife and babes, / His mansion and his titles, in a place / From whence himself does fly? He loves us not" (2-8). Her anger towards her husband, her insistence that he should first protect his family before he proceeds with affairs of state (dealing with the tyrant Macbeth) provides a contrast to Lady Macbeth and her reaction to her own husband. While Lady Macduff is angry because her husband does not put his family first, Lady Macbeth (in act 1) cajoles her husband to put his ambition above all other matters, including his conscience. When the murders come, Lady Macduff says, "Do I put up that womanly defense, / To say I have done no harm? 976-77), which is another implicit swipe at her husband for putting her in a position to defend herself (instead of him defending her), and is also once again a contrast to Lady Macbeth who refuses any sort of "womanly defense," being, within the terms of the  play, very "manly" in her violence.

Lady Macduff is furious at her husband's abandonment-she calls him a traitor and a coward. She tells her son it is left up to the mother to protect her young now, and that his father is dead.