Malory didn't need to be in the scene. TWW viewers are intelligent - are we not? I think we could have assumed as much and so she really didn't need to be there.
And while I'm on the subject of scenes that don't fit,
I really disliked The Wedding
What no Liz? No Zoey? - not even a mention of them iirc (I could be wrong on that point).
I know it was S7 and there was a lot going on at home and out with the campaigns, but really, the lack of sisters? I still don't get it.
Yes, we can come to our own conclusions but even a face here or there would have been better than nothing at all.
I found the entire wedding setup unbelievable because of this.
Oh and what happened to Ainsley, I mean where on earth did she go? I think we each could have our own theory but it would have been nice for the writers to add a little something in there, you know, so that the world made sense!
I really get annoyed when they don't follow up.
Let us think for ourselves, sure, but in the real world people aren't automatically forgotten about.
Sam left for California and his name is hardly mentioned again until Josh meets up with him in S7.
He was a WW employee for years, are we supposed to believe that his name just wouldn't come up with Toby, Josh and CJ?
I don't knock TWW often, I have been a faithful fan since it first aired and I recorded it everyweek on video, but these are just a few gripes 
I needed to get all that off my chest