Author: H.User1325 (20 Nov 13 11:17am)
Sorry to hear that your wife (and you?) share an ip address with a spammer or someone with an infected computer that sends spam.
When you login, on the top left of your home page is a place to lookup an IP address. Enter your wife's ip. After the description of the IP is a link to add a comment about the IP. If you have checked you computer(s) to make sure you are not sending spam, AND worked with your ISP to stop other spammers, this would be a good place to explain the situation. The maintainers of the list may white list the IP. Of course if more spam is sent from the IP white listing will be reversed.
If others that share this IP are sending spam you need to work with your ISP and get that situation resolved and/or get assigned to a different IP.
None of this will have an affect on the Google results in the short turn. Google follows their own rules about when and how their results are updated.