I always struggle with the give money to family aspect. I know that sounds horrid but money has massive potential to muddy relationships. in a way I'm glad I never win anything (big amounts) as it's easier.
dh's mum for instance, would really benefit from a cash windfall. but then she's so poor at managing her own money (always spends it all on rubbish/everyone else who she feels bad saying no to) that I'd be hesitant to hand large chunks over.
and where do you draw the line? here's $500k each to help you along a bit. how would you be able to say no if they asked you for another $500k down the track if things went wrong for them.
I just feel like it has the potential to turn into you being the free bank and resentment etc would build.
I'd rather buy them specific things they need, eg: fix up mil's house for her, buy my parents a new car each etc etc