As a psychotherapist who deals with families in transition, I couldn't agree more. That wall, both literally and figuratively sends a clear message that the divorce is final. One thing not mentioned in the article is that if the child still harbors fantasy of parental reconciliation, then that child will see a new partner as a definite threat.
Setting clear boundaries gives the child a chance to grieve so that when a new partner is introduced to the child,the relationship is not met with resistance.
Divorced parents need to be mindful that their child may need more time to grieve and accept the divorce than the parent. So just because you are thrilled to find love again, doesn't mean your child will celebrate with you. If you haven't respected the child's need to mourn, your new love may be the recipient of all their feelings of loss and anger. Not the best way to start off a new relationship.
Donna F. Ferber, LPC, LADC
Author "From Ex-Wife to Exceptional Life: A Woman's Journey Through Divorce."