KVM: Recover console of VM which connected to console of another VM

How do I recover the console of the first guest when itself is connected to a guest of which it is the host?

Host1:~$ virsh console Guest1

...

Connected to domain 'Guest1'
Escape character is ^] (Ctrl + ])

Guest2 login:

Guest1 has been connected to Guest2 using the virsh console Guest2 command. Guest2 runs on Guest1 with the same KVM and LIBVIRT packages as Guest1 does on Host1. I do not want to reboot any machine. I possess the credentials of all machines.