Will my booked return flight affect my 90-day Non-O visa application based on marriage?

The individual is applying for a 90-day Non-O visa based on marriage while expressing concern that their previously booked return flight for 4 months might pose issues with the Royal Thai Embassy. Community members indicate that a Non-O visa grants a 90-day stay, and typically does not require evidence of onward travel. Furthermore, there is an option to extend the visa for an additional 60 days if they have immediate family in Thailand.