Complex sentence: Recently he has been seen working alongside Kaine, going as far as to refer to the man as "Uncle Kaine," thus confirming that he is fully aware of his relation to both Kaine, Spider-Girl and her father Peter Parker.
Split into simpler sentences: Recently he has been seen working alongside Kaine, going as far as to refer to the man as "Uncle Kaine". Thus confirming that he is fully aware of his relation to both Kaine, Spider-Girl and her father Peter Parker.