Hopefully you can excuse yourself at some point to check on your cat who's in labor. It would probably be a fun party if you weren't preoccupied with Radar's labor!
I am thinking something is not right. I think there may be a breech kitten. When it stays in the birth canal too long it is stillborn. The kittens behind it can die too from not being born. Infection can set in. That is not normal discharge.
The only other thing I can suggest is that you massage her belly in a motion towards her back end to see if it will stimulate things. A little pressure but not too much.