Yellow Lab Breeding

[Stormm]

So its been 6 months exactly since i purchased my yellow labs. Im assuming that they were atleast a month old at the time I purchased them. Ive had a lot of trouble sexing them but i have figured out that one is male and the other is female. They are both fairly large, i would say just under 3". So i thought, hey maybe ill see if they breed. I have turned up the water temperature very slowly the past 2 days and its now at 82F. I noticed the male chasing the female since i did this. I have many flat rocks in the tank since ive heard she will put the eggs on those.  I have not seen much more change, but the female is staying closer to the male. No enlarging of the female mouth. anything else i should do?, should i wait a bit?