I have a high page rank "6" on my website. Today, I created a page on my domain for my girlfriends (existing) real estate site. I connected to her php's, such as the MLS database as well as a few other database's. I know I can get this site way up there riding my coat-tails as opposed to her getting a new domain and starting from scratch in that competitive field. This is really working on me.
Could having a completely different business, description, keywords have potential page rank ramifications? Since unrelated to my primary business, will I get penalized in any way? Thanks, Mauidan