1. Well it seems that your wife, either on her own accord or under pressure from her parents, has backed out of her promise to file for mutual divorce.
2. You cannot force her to file for divorce. The agreement of mutual divorce, if recorded, is a waste paper now as she has refused to file for mutual divorce
3. You may unilaterally file for divorce on the ground of cruelty, albeit your query does not disclose any instance of cruelty.
4. She has the right to reside in her matrimonial house as long as she remains your lawfully wedded wife.
5. She may file proceedings for domestic violence and dowry harassment against you as retaliation to you filing for divorce.