What does climbing ash mean in A Dream of Red Mansions?

The meaning of adultery between father-in-law and daughter-in-law

Jiao Da said this sentence is mainly aimed at Jia Zhen and Qin Keqing. The original sentence was: "I'm going to the ancestral temple to cry."

Now there is hope to give birth to these animals!

I don't know anything about stealing dogs and playing with chickens and climbing ashes every day and raising a brother-in-law in my brother-in-law.