When I married, I was in my mid-forties and my wife was in her late thirties, with an ex-husband and a child. I paid zero sinsot, though I (actually my father) did pay for the wedding.
When I asked her about the sinsot, my wife told me that it was not needed as this was not her first marriage. However, if her parents had still been alive, we would have been expected to send them some money every month.