Its about time in my opinion. As a Christian I'm sick of Christians saying gay marriage will ruin the institution of marriage when heteros (and yes including Christian heteros) have already done a pretty darn good job. Lets all focus on ourselves before others - thats actually something Jesus said!
But I honestly don't have a problem with making divorce a little more difficult in the situations she is trying too -if two people decide to marry and have children, make them be a little more committed to that family structure than just letting them get out of it because they had a fight and can't make up.
(yeah, maybe a little simplistically stated but you get my point)