It is true, she will be disciplined, likely disfellowshipped and shunned by all including family members. I had a JW friend in the same boat. The elders insisted she break up with him on the telephone in their presence immediately. She refused, so they disfellowshipped her. The shunning even held through the tragic sudden death of her JW son. No one spoke to her at her son's funeral. That's how sick this cult's control can be.
All too often, cult members return later, after having children, from example, because they still believe. Please educate yourself! Read Combating Cult Mind Control, By Steven Hassan.