How do iknow if she's hiding something?

Answer 1

Its difficult to tell. Some people are good at hiding stuff and hiding the fact that they are hiding stuff, so if she's good at it, you can never tell. However , assuming she's hiding something personal, she may resort to being more restrictive and and get very protective of her personal things (phone, emails, etc) of course this doesn't mean she's guilty of anything since lots of people like their privacy. You should pay more attention to the things she says and the explanations she gives...then after awhile with the info you have you should cross examine her and see if things add up. However like I said earlier, it all depends on the person.

Answer 2

She might unnecessarily change topic or be suspicious when you arrive suddenly or ask what she is doing.