I would be just as inclined to sit down strap in & get my hands on the controls, as I would have been disinclined to skip off for a nap just before crossing the ITCZ/Weather.
Some on here seem to have problems with that & think" all crew should be capable of flying" / "crew must respect the rest allocation to be rested for arrival" etc.
I don't think this situation was one where respecting anyones sensibilities was of any importance, the most senior guy (who is payed to be in charge/paid to ensure safety) should have taken a hold of the damn thing. . . on the 2nd point, the arrival, & how rested you feel for it,is of little relevance, if, in the meantime, you dump the ship in the ocean.