Why are my wife's panties wet at the end of the day?

My wife does not get wet during intercourse, but her panties are wet when she comes home from work. What's up?

Ok a girls panties are always wet, us girls unfortunetly get wet discharge everyday, esp around the time we ovulate, so we are always leaking so to speak. But during sex she prob isnt turned on enough or just doesnt get wet enough, maybe you just need to use more lubrictaion.