If you dont like it .. reject it.
It is going to be a long term relationship between your future brother-in-law, dont waste time anymore if you dont wanna do it, sound out early said you are not prepared.
It is not a matter of $$$ , make it clear.
And talking about appreciation, my gf's bro's wife said "thank you" to me without looking at me but looked on the floor instead, when i took their ROM pics for free!
EXAMPLE (Pls, only example):
You like prostitutes, you stick to your believe and visits them. Then you can go and die.
You thinks that you would want to save money and scrape this year's holiday plan and stay in Singapore / Malaysia instead of going to say, Korea. So that you can have a emergency savings. Stick by it.
Most probably your girl will throw a tantrum saying that you don't love her, if you give in then, she thinks that you are a wimp. However, if you stick to your decision, which is a GOOD DECISION, she actually looks up to you. She will feel protected. Which is exactly what she wants.
Tell him you have just STOP photographing for now.... may be next yr. you will start back lah... this will buy you enough time for u not to shoot for his wedding.
Go to the dinner and enjoy the food and pass him the red packet. End it there and then.
Taking photos for relative is not as easy as one thinks cos. after the shoot we need to face lots and lots of comments and special request too. and once done free and if you got lots of other relative going to get married then GOOD LUCK to you bro... ha ha . so what i suggest is that go to the dinner and enjoy the food and pass him the money .
And if you dont want him to forget you then in side the red packet put $8 instead of $80 ha ha ha sure he will remember you for life...
just shoot and end the whole thing.
Eat breath LIVERPOOL!!!