True professionalism from both. Gongol knew the FO was best qualified to get everyone (including his family) safely on ground. Gongol's credentials were at best in providing a confidence boost for the FO, which is the exact thing he did.
I cannot help myself from theorizing though on this question:
I also had about five seconds to asses her, 'was she panicking, or was she OK to fly the aircraft?'
Is there any precedent or legal framework to "what if" he had decided she was not capable and he wanted to take over?