How can I create a husband/wife relationship? What about a parent/child relationship? What if there are multiple children? I see this user created a custom module to accomplish relationships - https://help.zoho.com/portal/en/community/topic/many-to-many-contact-relationship. Is this considered the best route? My client would like to use this information to email parents who have kids under a certain, so the setup would have to result in good reporting.

Any help would be appreciated