'Cable DSL'? Are you sure?
I thought it was
either cable
or DSL, DSL (or ADSL) being the one she
doesn't want.
And so far, nobody has asked Mrsmac to ensure that both PCs she wishes to connect have an ethernet port, nor have they told her that she may need to buy two lengths of ethernet cable when she visits PC world (I suspect that the router will come with, at best, one length of cable to connect the router to the cable modem - if it doesn't, then put three lengths of cable in your basket).