Emily from NS227, nice, young and tight body, managed to get a CBJ but nothing further.
Sky from SBM. Really tried to go for more after her CBJ but, no luck. Definitely one of the best blowies I've ever had, I even tipped her extra on top just for the quality of it.

There have been some girls that are known to strictly be CBJ only but on occassion they will want to do CFS. I've asked why and it's either they're feeling extra horny that day or I'm good looking enough to fuck, sometimes it's both.
Also helps to present yourself neatly at times. It's sometimes just a YMMV game depending on how the ML feels that day.