If a single father remarries, there can be several major issues that need to be confronted. If he marries a woman who's never been married and / or had children before, it can be difficult for her to build a relationship with his children, and there's the chance of his children rejecting the "outsider."
單親爸爸再婚的困難在於：如果對象是未婚女性、不曾養育過孩子，她跟孩子關係的建立相當困難，很可能造成「有了新人、失去兒女」；如果再婚之後又生育，親子關係更複雜。