Divorce case. Husband filed. How to dismiss the case n win back. Maint

My frnd husband filed divorce petition on cruelty desertion. In laws sent her to parent's home after a month of marriage since they couldn't take care of her due to pregnancy.After delivery husband used to visit one or two times n that also stopped.No one came to take her back n no money given by husband to meet there need's. She raised the female child alone n even during corona peak times hus didnt check with her or child n she stopped talking to Hus to avoid fights bec hus staying with inlaws.tats were it went wrong n inlaws used tat gap n brainwashed hus n she waited for her husband since its love marriage n he will understand n come but went vain. Wen child attained 1.5yrs they came for formality n wen my frnd shouted for all there wrong doings they simply went- not even shown interest in seeing baby face n after few days they sent divorce notice.I think they waited for 2 yrs of seperation to file. How to fight back n wat to do to get back n break the case.can we dismiss the case!