My boyfriend pays for his family members, I’m worried if it will continue if our relationship gets more serious?

For example, his sister recently came to visit with her boyfriend. He paid for her flight. He paid for the meals out. He paid for both her and her boyfriend to enter a museum that was quite costly.

His sister is young and has recently started working, but even so, I’m worried that this trend will continue , maybe into marriage etc and I’m worried about it’s effects on us. Am I reacting too strongly here?

My boyfriend pays for his family members, I’m worried if it will continue if our relationship gets more serious?
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