Scar and Zira were mates. He fathered Nuka and Vitani, but chose Kovu,
because he didn't think they were...worthy...enough. (I can understand
him passing over Nuka.)

I'm pretty sure Scar mated with Zira. No she was not in TLK 1.

probly plus she the leader of the pride of hers so she would have
mated with scar

Go by the movies please. Zira's goal was to avenge Scar because Simba
had killed her mate. She was rather angry as you could see. Basically,
they were mates, although Zira was clearly not mentioned in the first
TLK film.

scar and zira were mates but she wasn't in lion king 1 they did not
show her yet

i think they were together at one point but its really noware in any
of the movies. we fans (some if not all here) assume he and she had a
relationsip because look at nuka he looks TO MUCH like scar, had it
not been for the termites i think it'd be hard to tell them apart
resemblence wise. If she was in part one we didnt see her and she
wasn't needed scar and his minuons were enough at the time.