>> i was not sent to albany to vote on or to push an agenda of extreme social issues. >> reporter: but back in his home district, brian sheerin had lobbied senator ball. he's been in a relationship for 15 years with his partner, ken weissenberg. they have two adopted daughters. it's estimated that 27% of same- sex couples have at least one child. at the core, what is this about for you and for your family? >> for me, it's about protection. you know, $40 marriage license can do what $10,000 in legal fees in terms of wills and trusts can't do. >> reporter: it's something his partner, a tax lawyer, knows well. >> in new york state, there are over 750 laws impact bide the single word "marriage." so changing that definition so that it include gay couples means you don't have to amend 750 laws in new york. >> reporter: the bill governor