The proper thing to do would be object. Being in the same bed with the person he's been fantasizing about seemed like a very bad, no good idea. On the other hand, they were both so tired, what could possibly happen?

So he didn't make a decision immediately. Instead, he gathered up some pajamas from the small dresser next to the desk and made his way to the bathroom to brush his teeth and change. He wouldn't be surprised if Eli was already dozing by the time he returned.