This should be sorted out early this week, in terms of whether he is going to face charges or not. The earlier police can get through their enquiries the better - if Stewart not talking so far has delayed that, then he is to blame if it spills over to round 1.
Whether he should be stood down or not comes down to his club - is Stewart being honest with them. Is he informing them of his story/alibi/reason for denying the allegation? Greg Bird lied to his club, and then went silent on them - so his club stood him down.He wasn't stood down about the charges, he was stood down for being a twat to his bosses, but they kept him on full pay until they eventually sacked the grub.
Manly's statement indicated Stewart had spoken to them, in that they said he was denying the allegations. So that's one less reason to stand him down. But if Stewart is charged with something major this week, then that would be sufficient grounds for him to be stood down until the court case takes place, just like Bird. (Except I don't expect Stewart will go around saying how unfair that decision was, and how badly he was treated while keeping his club in the dark the whole time...)