If an undertaking is being drawn up that appears to be very lopsided between a wife and her husband & in-laws, it really calls into question the fairness & respect of that marriage. The draft also wants the 'wife' to promise that she would not indulge in any dispute, restrict her visits to parental home and as well as refrain from asking husband to live who are residing separately from their families.
This unequal practice, unless the husband and in-laws are also prepared to offer an assurance or undertaking on their part as well, might result into a controlling, suspicious environment. Reminder: your marriage is a partnership and you should both feel respected - Your voice matter. Without mutually accepted responsibilities, this can lead to feelings of oppression and powerlessness. This can potentially be used as evidence in wife's favor or against her showing whether she is compliant or not of the husband and to what extent does she has autonomy.
If you force her to sign the undertaking, it may not hold much value legally since any agreement made in pressures is null and void to ensure their legality, they should include these key elements:
Identification of all the parties involved.
Offer. Details of what it is one party is offering the other or that all parties are agreeing to provide one another.
Acceptance. Clear confirmation that all involved parties agree to the terms of the contract.
Consideration. Details of the value (financial or otherwise) being provided by the parties.
Competency and capacity. Meaning all parties are capable of both understanding and undertaking the terms of the contract.
Legality. Elements like signatures and dispute resolution clauses may be necessary to ensure the legality of any contract.
But with that willing gratitude, if she ever later violates it... this could be part of a divorce against her. These documents should never be signed by the wife without proper legal advice. A lawyer - and only a lawyer... can help her make sense of the process, ask questions that most women don't even know they should be asking, understand what is happening to her and protect HER rights too. It may also be helpful for them both to seek counseling, or even mediation so that they can address any underlying issues and find a more fair and respectful solution. The slant on any root by which the tree of marriage is twisted, should always be towards good communication and fairness. Both the sides should act as a team that makes each other stronger and not someone who sets up terms mutually.