Is it permissible to supplicate for someone who has committed adultery with multiple individuals, including his brothers' wives?

We ask Allah to grant you guidance and success in repentance. You should supplicate frequently and ask Allah for well-being, for sins are dangerous and destroy their perpetrator.

It is obligatory for you to hasten to sincere repentance. Your feeling of guilt is the beginning of the right path, and if you are sincere with Allah in your resolve to abandon it, Allah will be sincere with you.

Avoid all means that lead you to indecency, especially forbidden looking and private seclusion with those who are not permissible, such as the husbands of sisters, for "the in-law is death." There are many means that help in treating sexual deviance.