Here are some quotes from the August 2002 Kingdom Ministry
"Display Christian Loyalty When A Relative Is Disfellowshipped"
"The bond between family members can be very strong. This brings a test upon a Christian when a marriage mate, a child, a parent, or another close relative is disfellowshipped or has disassociated himself from the congregation."
"How to Treat Expelled Ones: God's Word commands Christians not to keep company or fellowship with a person who has been expelled from the congregation"
"Jesus was... instructing his followers not to associate with expelled ones."
"This means that loyal Christians do not have spiritual fellowship with anyone who has been expelled from the congregation. But more is involved. God's Word states that we should 'not even eat with such a man.' (1 Cor. 5:11) Hence, we also avoid social fellowship with an expelled person. This would rule out joining him in a picnic, party, or trip to the shops or theatre or sitting down to a meal with him either in the home or at a restaurant."
"What about speaking with a disfellowshipped person?"
"A simple 'Hello' to someone can be the first step that develops into a conversation and maybe even a friendship. Would we want to take that first step with a disfellowhipped person?"
"The fact is that when a Christian gives himself over to sin and has to be disfellowshipped, he forfeits much: his approved standing with God;....sweet fellowship with the brothers, including much of the association he had with Christian relatives."
"Former spiritual ties have been completely severed. This is true even with respect to his relatives, including those within his immediate family circle....That will mean changes in the spiritual fellowship that may have existed in the home. For example, if the husband is disfellowshipped, his wife and children will not be comfortable with him conducting a family Bible study or leading in Bible reading and prayer."
"The situation is different if the disfellowshipped or disassociated one is a relative living outside the immediate family circle and home"
"It might be possible to have almost no contact at all with the relative."
"Loyal Christians should strive to avoid needless association with such a relative, even keeping business dealings to an absolute minimum."
"Sometimes Christian parents have accepted back into their home for a time a disfellowshipped child who has become physically or emotionally ill. But in each case the parents can weigh the individual circumstances."
"Will he bring 'leaven' into the home?"
"Cooperating with the Scriptual arrangement to disfellowship and shun unrepentant wrongdoers is beneficial."
"After hearing a talk at a [Jehovah's Witnesses] circuit assembly, a brother and his fleshly sister realized that they needed to make adjustments in the way they treated their mother, who lived elsewhere and who had been disfellowshipped for six years. Immediately after the assembly, the man called his mother, and after assuring her of their love, he explained that they could no longer talk to her unless there were important family matters requiring contact. Shortly thereafter, his mother began attending meetings and was eventually reinstated. Also, her unbelieving husband began studying and in time was baptized [as a Jehovah's Witness]."