Maybe not...he obviously left dressed in his suit etc, saying he was off to the office..and changed into his "proper" work clothes elsewhere
No doubt he'd have told her that they werent allowed personal calls at work, so if she needed him to call his mobile, so he'd have avoided her calling the office where he didnt actually work
Im assuming though to keep up with the fantasy he's run up credit cards bills, loans etc to show that he was earning a big wage, and not just the bits he was getting from fruit picking etc - which is why I guess the baliffs turned up.
I guess in real life she would have had some suspicions, but I guess more lies etc would have been told to try and cover up, and throw her off the scent...for a few more weeks .