My sister in law doesn't want to appear for the summons in Baroda.

Hello, my sister in law (Aged 43 Years) has received the summons for appearance in family court @ Baroda on 9th Jan 17, in connection with a divorce petition filed by her Husband... She is separated & staying away from her husband since last 8-10 yrs.. She is currently residing @ Gadag, Karnataka with her 70 yr old mother .. She wants to give the consent for this divorce.. & she does not want maintenance/alimony neither the custody of child (17 Yrs). Only constraint that she is unwilling to travel to Baroda leaving her ailing mother, to appear in court. And it might be a traumatic affair for her to face this, as she has already on anti depressants. Another hampering factor is, that case is in Baroda, She is in Gadag & we are in Thane (Basically we are their Support System right now as she doesn't have brother/s & father expired around 30-35 years back).. Now kindly let us know how we can approach ahead in this case, so that we follow the law correctly & close this