Divorce can manifest in a number of ways, including income changes, stress increases, expense hikes, etc. When two children are the same age it does take a financial hit on a family because there is not the ability to pass down clothes, cribs, etc. In addition, two babies staying up all night puts both parents in a sleep deprivation, which can lead to stress increases. The parents can manage these factors, so simply having twins does not predetermine your marriage failing, but failing to recognize the stresses and addressing them together can lead to divorce.
If you are thinking of filing for divorce, it is a good idea to find out your rights and options by speaking with a Jacksonville divorce lawyer.