Girls and protein?

I try to do about 5-6 cardio sessions a week, usually a combination of cross trainer or cardio-based classes at the gym (mainly BodyCombat, but sometimes step or attack), as well as a game or two of squash/tennis.  I'm trying to get a little more toned for the summer, so I'm slotting in a few more free weights/BodyPump sessions in my workout routine. 

Do any of you girls take whey protein after your workout?  I understand that's the fastest absorbing one.  I'm going for the lean toned look as in no wobbly bits.  I know it's pretty much impossible for girls to look "buff" unless they're on steroids, lol (we don't have the testosterone for it!)  I certainly don't "bulk" very easily anyway.

Oh, I'm a pescatarian so at the moment my main sources of protein tuna, eggs and cottage cheese.  I also have beans, other fish etc but I'm really busy during the week so usually stick with whatever's easiest. 

Would be great (and more relevant to me) to hear about your sources of protein, rather than read about it from guys trying to look like the hulk.