That *is* ridiculous.

Mom pays for the phone, she pays for the computer, she pays for the
electricity; she has the right to monitor the communication taking
place using her property

No, it's not ridiculous at all. The mother can ALLOW the child to use the
phone. If she does, then the child has an expectation of privacy while
using it. If the mother can't live with those terms, then the child
shouldn't be on the phone at all. Put another way . . . if you don't trust
your child to use the phone without illegally spying on him/her, then your
child shouldn't be using the phone, period. -Dave