Didnt you say that St.Adept had got you a wireless router Clive?
As I understand it the router has the actual IP address and it doesnt allow your supplier to know how many computers are running on it
If so the only reason Mrs.Clive would need her own account would be so that her e-mail address would still be available and active.
I cancelled my V21 56K account montns ago but my address is still active although I dont use it now it still gets an occassional spam one on it
If she is happy to change it to one of yours then there is no need for any further accounts unless you expect to have problems with your ADSL service or the router