There are therapist articles on this topic if you are interested:

(PDF) Crying as Communication in Psychotherapy: The Influence of Client and Therapist Attachment Dimensions and Client Attachment to Therapist on Amount and Type of Crying

My client is crying – The Relaxed Therapist

https://onlinelibrary.wiley.com/doi/....1002/cpp.1879

(not endorsing, just sharing)