> she was ready Friday
How do you know she was ready Friday? did she have a progesterone test to show she had ovulated and Friday was around two days since ovulation? If not then you do not know she was ready no matter her behaviour if the dog is not interested it may still be she is not ready.
I just tried mating one of my bitches and as she had been mated days 14, 16 and 18 when I took her to USA, and produced a litter 65 days after the first mating (this would mean she actually was mated on or just before ovulating), I tried this time on days 15 - 18 and the dog said no.
Unfortunately his owner was unavailable on the following few days (whelping her own bitch and unable to leave pups) so we don't know if she may have been even later this time, or perhaps even had ovulated early on and gone over before we started (though behaviour wise I think it was more the case of she wasn't quite ready enough for him).
I also had a bitch visit a stud dog I was handling for a Friend. She had been tried with another stud on two or three occasions and never got a mating despite showing willing. They did do one blood test but with a weekend intervening between results shoeing no yet, they simply brought her up.
The bitch was very willing but the dog was only half hearted testing the water and would not mate her. she was also very small,a nd a vet examining her didn't think a mating would be possible. So this was the news we were going to pass the owner that she was just not mateable.
Next morning he mated her and for three days after, result a litter of 6.
She had been flagging from day 11 Aden finally was mated on days 16 to 19! He knew, she was simply a tart.
Of course you could have the rare male that just doesn't make a stud dog.