From the article;
In 2013, Hunter Biden and the stepson of former Secretary of State John Kerry, Chris Heinz, were managing partners in the private equity firm Rosemont Seneca Partners.
Don't know about Ashley Madison.
http://www.breitbart.com/big-government/2015/08/27/exclusive-hunter-biden-ashley-madison-account-created-at-college-he-taught-at/
As expected that news was ignored by the MSM.