Please Enlarge pic to see the beauty of it. It was red and black spot few days ago, right before that small one appeared.
maybe Araneidae family
This beautiful spider is Herennia multipuncta https://en.wikipedia.org/wiki/Herennia_multipuncta
A common name is Ornamental Bark Spider.
The small spider is a male that is attempting to mate with the giant female.
Thank you for sharing your photo of them.