If you're really concerned about it, ask the breeder. She should be willing to answer your questions so that you feel completely comfortable adopting from her.

Looking through the site, she seems like an excellent breeder. Inbreedingis something to be done carefully, with a lot of thought to the possible consequences should something go wrong. If she has strong, healthy lines (which I believe she does) then occasional well thought-out inbreeding to solidify desirable traits is ok in my opinion.