Peace be upon you and God's mercy and blessings,
The wife's share in your case is one-eighth (the eighth), so you are not being unjust to her if you give her her rightful share, which is one-eighth. She has no right to demand more than that. However, be cautious not to let resentment take root in your hearts, as God does not approve of that. Therefore, make every effort to avoid bad relations among yourselves. Remember that kindness does not stop at fulfilling rights; it is a generosity from the giver. {If you do good, you do good for yourselves} even if it is in response to wrongdoing. It is one of the noble traits of character to be good to those who have wronged us, and God does not waste the reward of the doers of good.