According to Reading Council's website, she sould be entitles to more than 10 visitor passes per year:
Residents' visitors (cars light vans, and motorcycles only) Single use scratch cards, one to be used per vehicle, per day, valid until 10:00hrs the following day. Maximum of 11 books of 10 scratch card permits per household per zone year; proof required of residency. Permits will be issued for the defined zone, which applies to the address. First TWO books of 10 cards each zone year issued free of charge, thereafter, �12 per book of 10 cards.