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I can think of a dozen birds with eggs that resemble those in the photo. My first thought is Black Thrush but the pine tree is odd. In my experience, Black Thrushes are typically defensive. The male will be nearby and you should see him if the female is complaining. He will even examine the nest after you leave the area. Black Thrush is possible but there are other Thrushes. The Jay usually nests higher than 2m and you should be able to recognize it easily.

I've attached a photo of mine depicting the female Black Thrush for reference. The female can appear to be very dark brown to taupe with brown colors. Key is the yellow beak.