Hi neil, is your wife the breadwinner of the family?
How desperate do you think her family needs help? I think you put that into consideration before sending money....
You don't want to encourage them to be lazy and be a free loader all the time,
specially the sibblings, if they are all grown up and adults....or even married and with kids already,
they should learn to fend for themselves - financial dependency may become a habit...
The parents, you could probably send some money specially if they are old and weak and needs medical maintenance.....
Just my opinion though, no ofence meant to anyone......