That "shameless PWP" line put me off and I thought I wouldn't like this. I shouldn't be surprised, as I've read "Have Your Death And Eat Cake Too", that the sex scene has an almost romantic feel to it. The affection the girls gave to Madoka, especially Homura (and I did love that whispering part; the thirst-quenching kiss), was very sweet. It's like the Sono Hanabira OVA where people come in for the porn and come out clutching their chest or experiencing high blood sugar.
Anyway, great work.