If she is fine before feeding and after day feedings, have you looked carefully at what you are eating/drinking in the late afternoon/evening?
You say she's ok the first couple feedings, then the later ones she cries, I would check my dinner menu. As has been stated earlier in the thread, everything that goes INTO you, goes OUT in the breast milk, including spices, any kind of medication, sugars etc. Try a fairly bland diet in the evening for a few days and see if that helps. (skinless chicken, baked or broiled, with rice, very little salt or spices and light on the salad dressing! If so, then you can start to re-introduce things and see what triggers it. If that doesn't work, it may be she has a problem with breast milk itself (lactose intolerence), but since you say she is ok most of the time after feeding, not likely.
Things you may also want to watch:
Caffeine (coffee, tea, soft drinks)
Sugar: (same as above)
Fatty or greasy foods
Diet/Low Calorie ANYTHING! Many diet soft drinks or snacks contain ASPERTAME(sweetner) which can cause upset stomach, headache and heartburn in adults (I'm sensitive to it, I KNOW!)
Having a new baby is a very rewarding, but sometimes frustrating part of your life. Breastfeeding IS the best, most natural way to feed, but the modern human diet can sometimes make a mess of even that!
Having said all that:
YES< SHE IS ADORABLE!! (but much cuter when asleep, right?)