eye contact when accussed

if they are not cheating they should be able to look you in the eye and tell you.i got accussed before and i wasnt cheating so i told her to go and check my phone, email bills everything.if they are not cheating they will have nothing to hide. however you must know in your gut that they are cheating because if they are not then you put the relationship in jepoerdy by accusing them.