my wife uses facebook, i use facebook but i rarely check mine. we both have each others passwords. ive been on our computer before and shes said, "hey login to my facebook and put this as a status" lol. i have no issues with trust. if shes cheated, or going to cheat, i cant prevent it. she'll find a way, if thats what she wants, so i just go with the flow, and if it happens we'll cross that bridge when i get there.