She calls my landline from her landline. One day I might just ask her about it but I don’t want to pry. It started years ago after she and her DH had been through a rough patch. I have always felt uncomfortable witnessing some aspects of their marriage.....he can be a bully......but she can be as bad back.......they bicker and fault find continuously.
I can’t really think of any reason why you’d need to withhold your number if you were honest in your everyday dealings with people. The only example is withholding your mobile from your employer......quite a few of my colleagues wish they’d done that and a few have deliberately changed their numbers after finding it worked more in our employer’s favour than staff. (For example ringing on your day off with queries or trying to reschedule your shifts with less than 24hours notice.)