My friend was in the Jacuzzi. I was in the large pool. I was looking up at the sky as I had witnessed 4 other high altitude unknown flying objects earlier that evening. Simultaneously, we both saw a very dim, high flying object. My friend and I confirmed we both were watching it flying overhead coming from the East. As we continued to watch it, it was heading South...then it suddenly became larger and extremely bright. It emitted a white round light. Just as it quickly as it became large and bright, it changed direction back towards the East and dimmed again. I watched it as long as my eyes could possibly see it. It accelerated as it moved East. I have never witnessed such an event in regards to UFO's. I felt as though it intentionally shone bright over us as if to acknowledge "they" knew we were watching.