How can a solution be reached with a son who has begun to withdraw from his mother's life after his marriage, especially since she raised him and his siblings after their father's death?

The rights of parents are great, especially those of the mother, as Islamic law has made it obligatory to honor them and treat them with kindness. Marriage should not distract a child from his mother; rather, he must be keen to fulfill her rights. If the son is negligent in fulfilling his mother's rights, he is doing wrong, and it is advisable to pray for him and counsel him gently, seeking the help of someone he respects. If the son is living his life without infringing upon his mother's rights, then she should ease her mind.