Punting phone care

[Magicman]

Nothing unusual about a person having a cheap second phone that is always kept in the car for emergencies (if you leave home without your regular phone)
Keep the battery charged, keep it topped up with credit and always say to the good wife to check that she has the emergency phone in the car.
After all the phone is for her use in the case of being stuck without her own mobile

Delete any calls you make, to Escorts and every so often change the SIM card if it isn't going to create suspicion with the wife.

This isn't a phone for general use so don't give out the number to anyone.
Never have a hidden phone as that arouses suspicion when found and means you will need to lie or else have a handy excuse.