[Pink Pegasus]

In the episode itself at about 16 mins in the following is said:

"For the past 24 hours viewers have been tweeting their opinions of the housemates and earlier Big Brother briefed Michael with their thoughts, which he is about to deliver to the house"

(Michael then goes on to make the comments including the sideboob one)

so yeah I think the sideboob was something he was told to say by viewers. Did she not even get nicknamed "Sideboob Sallie" somewhere on opening night? It might have been on this forum, not sure. I think her sideboob has been mentioned on BOTS before but I'm not 100% on that.

Michael probably enjoyed making the comments as he genuinely doesn't seem to like her (even as his real self).