Google's complicated relationship with its founder's wife just got more tangled. Anne Wojcicki's genetic-testing startup, 23andMe, not only took a second round of funding from the company — it's now cohabitating with the search giant.

According to an SEC filing, Google put an additional $2.6 million into 23andMe, following up a $3.9 million investment in 2007. And Google, which has been laying off workers, is renting space to Wojcicki's firm. On what terms? No one outside Google knows, except for one appraiser whose opinion is unclear. From the SEC filing:

In June 2009, Google also entered into a lease agreement with 23andMe... The terms and conditions of the lease with 23andMe were reviewed by an independent real estate appraiser.

It's not clear whether Wojcicki, who recently gave birth to son Benji, will work from the new digs, but the proximity to Brin — and to Google's free child care — would certainly help her keep child-rearing and a high-powered career in easier balance. Whether the deal is as good for Google shareholders remains unclear.