If your spouse travels a lot, you are used to reaching them at different locations. Most likely, you have called them at the hotel they are staying in. It’s normal for a spouse to let the other spouse know what hotel they are staying in. Do you find that it’s difficult to reach your significant other when they are on business? Do they only answer their cell phone, but never seem to answer from their room? They could be avoiding taking calls in their room because they are not in their hotel room. Alternatively, someone might be in their room with them, and they don’t want to be disturbed. Either way, this is suspicious behavior.