I just rephrase what Ronald already answered.
all traffic what enters the "parent AP" on the wired port will go through WDS link to "child AP(s)". If the wired port is enabled on the child AP (wds bridge) then that traffic will egress the child AP on the wired port.
of course if the traffic entering parent AP should go to the wireless client, it will not be sent out to the wired port.
in other words it does simulate wired link.
Zdenek
Regards
Zdeněk Pala