Yeah, that first report is a bit misleading if not read carefully. The permission to check on a deal came after the reports of grumbling from Karl, and after Cousins got upset from those reports and felt unwanted in Sacramento, so Vivek felt forced to let the Agent at the very least explore the alternatives.
Things clarified a bit later after that, and Cousins seemingly still wants to remain in Sacramento which is seemingly Vivek's preference, and he's throwing Karl under the bus in the process (which he deserved if the reports of how things have transpired are true).
I do think that Cousins remains slightly on the market, but I don't think it seems as a foregone conclusion as it once was. We'll see.
And honestly, I think Vivek gets murdered in Sacramento if he does any deal that improves the Lakers, in particular sending them their star center. Sacramento detests the Lakers with a passion, maybe even more so than us Celtics on our long rivalry with them.