That’s exactly how it works for me. From the very beginning of the relationship (7 years in)she was told “ I am not an ATM” I will give you an allowance every month and every month you can do what you want with it. (Mum and dad get 5000 baht).Use it and there will be no more. I pay all the bills, all the food, travel expenses, we have built a house together but of course the reality is it’s hers and it works. She actually saves. Her parents want for nothing as two other sisters also contribute and they have never asked me for a baht.
Getting married this year no sin sod required as they say I am good to her and have built a house. I guess I’m lucky but one thing I will say is before I got into any kind of relationship I was on these forums weighing up all the good and the bad with reference to Thai/Farang relationships and from the comments made I made my on own balanced decisions on how to proceed. So far so good.