<human>: My boyfriend and I have been together for 6 months, I will be spending the holidays with his family this year. I briefly met his sister at a group brunch a few weeks ago while she was in town visiting friends. We greeted each other hello but didn't really get to talk much due to our seating arrangements. 

This morning my boyfriend tells me that his sister wants to get me something for Christmas, and my initial reaction was "that is absolutely unnecessary" and he said "I agree, I told her not to worry about it but she is insisting.. so I told her just to buy you inexpensive costume jewelry.. and then she proceeded to tell me that she wants a leather jacket for Christmas." 

I know she means the gift would be from the both of us, but I can't even afford to buy myself a leather jacket. I think that because my boyfriend mentioned that I have my own business on the side (I am an Interior Designer and have a few clients here and there) she assumes I am rolling in money. Before taking a pay cut and switching to a new job my bf worked for Goldman Sachs, and last year bought his sister a pair of really expensive boots "to make up for all of the birthday presents he didn't get her." 

I think buying her such a luxurious gift last year spoiled her and gave her the impression that she can just email us a link to another luxurious gift. I don't even think she knows he switched jobs because she's always to busy to answer his phone calls or respond to his emails. I don't want to disappoint her when we get her a more "appropriate" gift, but I don't want to give in and just get her the jacket just to avoid any awkwardness. Am I over reacting?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Boyfriends sister who I met briefly insists on buying me something for Christmas, then told us she wants a leather jacket as a gift.