Can I Apply for a 60-Day Family Visit Extension After Marrying on a Tourist Visa?

hi all,

I arrived in Thailand in March, with a single entry tourist visa, which I extended with 30 days in April, so currently staying on the visa amnesty. I am in the process (almost completed) of getting married to my Thai girlfriend and without any unforeseen issues we should be married within the next 2 weeks. Now I'm trying to find out how I can make sure I don't have to go back to Belgium a week after we get married. I've come across the "60 day visit family" extension, but it is unclear to me if I can use that on regular single-entry tourism visa.