I don't think he shook her hand and she had a stunned look. She said something to CD and I think CD just said tough sh_t. When the lines broke up Geno walked away from her to center court and looked away from her direction.
When I watched them meet to shake hands Geno appeared to say something like "unbelievable" and didn't look at UCF coach while briskly walking by... (I thought they touched hands but need to go back and check the video.)
I think it was because UCF coach had her team put a major trap on K. Irwin as soon as Geno put the subs in. I guess that's poor etiquette with seconds left in a blow out. Was not well received by Geno.