* She is likely grieving: The play ends with the deaths of Romeo and Juliet, along with Mercutio and Tybalt. As Juliet's mother, Lady Montague would undoubtedly be heartbroken.
* She might be involved in reconciliation: The play ends with the Prince and the feuding families of Montague and Capulet agreeing to bury their differences. It's possible Lady Montague participates in this reconciliation, though it's not explicitly stated.
* She is left with the consequences: Lady Montague, along with Lord Montague, would be responsible for dealing with the aftermath of the tragedy. This would include the funeral arrangements, the ongoing emotional trauma, and the need to repair the relationship with the Capulet family.
While Lady Montague's specific fate isn't explicitly stated, her presence in the play suggests she would be deeply affected by the tragic events, especially the loss of her daughter.