I feel similarly. I can't tell. Danny is all about his image. He will have realised during filming that Bec wouldn't be a beloved character. If he said no it wouldn't make him look awful to the audience. Certainly not in comparison to saying no to someone like Rachel.
However, if he says yes then he will be tying himself and his public image to Bec's crazy and saying she is what he deserves and we all know how highly he thinks of himself.
I really dunno. I think he'll say no.