Oliver didn't particularly wish to discus the vampire. He'd made his opinions clear on the matter, along with his distaste for continuing to discuss it. He just didn't believe for a minute that Dean or Dinah would have left well enough alone--especially when they couldn't seem to leave each other alone.
He also had no desire to share their morning- or afternoon-after breakfast, but he was somewhat relieved when Dean left the room. If Dean could refrain from lifting his leg and marking his turf, Oliver could at least try not to start a pissing contest of his own.
"Should I take that as a no? Good. I won't take up your time, I'm just here to as you personally not to miss this meeting. It'll be good to have you back."