The odd thing is that Adrian isn't really flaunting any of this.
Well, not deliberately. But he's not exactly hiding it either. Amy seemed enthusiastic to tell her sister about all his conquests and how happy she was about it; it must already have been weird to Hayley that Marliese's girlfriend had been known to hook up with him; Jacqui spoke about her relationship to him with Brandi, as you point out; Caitlyn extolled Adrian's virtues to the cheer team; he's been seen in public with Erin and Amy, separately; Vik was already suspicious of him (rightly: Adrian basically stole his girlfriend); and, though we might not know the significance of this since we haven't seen Pearl/Miriam in a while, Erin was pleased to let her know that Adrian and her mom (!) were together, and that, well, Jacqui was Erin's boss, so that was cool. Kanti knew enough about who he was to wonder why he was out with Erin when he was dating Laura; and, of course, Derek, Claudia and Zenon all know at least something about what's going on as well.
Much of that is the result of his not knowing he actually had a harem until the night of the watch, or possibly after Rain spoke to him and he actively claimed them as his, but he hasn't gone to any lengths afterward.
Was anything actually taken in the "break-in?"
I think pictures were taken, so it wouldn't look as though anything happened. I think Vik, Kanti and Q are trying to make sure that knowledge of the formula doesn't get out, not knowing that it already has. Yves still seems the most likely, since Q told him about what Vik and Laura had inadvertently discovered.
