[giantg2]

"This will lead to family suspecting their mother of cheating or crime."

Generally not with the proper cover story. Stuff like working as a civilian purchasing agent for the military or other government agency provides an element of truth and can be strongly consistent with the realities of the true job. Travel for purchasing deals vs espionage, etc look the same for the family. Even better is if they actually are involved with the purchasing deals since it makes for a more solid cover.