听材料，回答：
How old is the woman going to be?

听力原材料：
M：It’s your 50m birthday．You decide．
W：I'd like you to organize a surprise party for me．
M：Sylvia．I know what you want．But a surprise party is impossible．Don’t you remember when I tried to organize a surprise party for your 49,th?You found out right away．
W：Don’t remind me．1 was so disappointed．
M：I remembered to get everything ready．But I just for-got to tell people that it was supposed to be a surprise but the party wasn’t disappointing．I mean，it wash’t a surprise，but it was great．
W：Well，I really don’t care what We do．Do whatever you want．
M：Oh，come on，Sylvia．Let’s plan something interest-ing．We could have a swimming party，or a covered dish supper．It could be fun．
W：Let’s just go out to dinner with a few friends．
M：But why?
W：Because it’s easy．I don’t want to have to do all the planning．