I think the answer is glaringly simple and the wrong question is being asked; what the hell are you doing even considering her going to play paintball; that's not what women are genetically fashioned for, you should be asking, 'how is she still gonna cook and clean for me with her broken finger'?
And the answer to that is :- 'who the fcuk cares? - just as long as it all gets done by the time you get back from paintball is all that matters mate.
If she pipes up and complains, ditch the bitch or alternatively, point her toward any of Charles Darwin's books concerning evolution ... all the answers are there for her little brain to ponder.
[//sexistpig]