I am not familiar with the Temple University or its website but read the interesting article.
As far as my knowledge goes…for those who have been divorced and remarried without annulment they are still in communion with the church (as Pope John Paul II stated) and may attend Mass but should not receive Holy Communion.For those in remarriages where they have not sought annulment but are living as brother & sister they may attend Mass and receive Holy Communion. In either case couples are bound to not draw scandal to the church (ie in advertising the fact ).
My advice to your family members is go and speak honestly to your priest and tell him everything.The priest will give good counsel and explain the authortive teachings of the Catholic Church as regards remarriage after divorce.
It is good to encourage our fallen away bretheren back to Mass on a regular basis.All are welcome just some may not be able to participate in receiving Holy Communion.
I would show much love and example of faith to my family members if they were in this predicament.
It is not for us to judge others.God knows our hearts and minds.He knows the goodness of our intentions and knows if we are truly sorry for our mistakes and sins.
God is the only one who truly can judge us all.
I wish you well and God bless