To be fair, he only said "blondes." He could very well be refering to another blonde he killed. Or he's just consistantly giving "fuck yous" to Parker even if they don't entirely made sense.
"See this costume, Parker? It's the one I killed your girlfriend in!" "Uh...actually, no it isn't. That one looks more armory then your old one--" "I'm sorry, I didn't hear that--I was too busy remembering the sound of her spine snapping like a twig!"