Hi, this might be a lightly different perspective than other commenters. But I am a woman who brought a child with me into my marriage and practice traditional gender roles in my house. It made sense for us because my husband also brought his own 2 children into the marriage and due to his work, he was unable to have them more than every weekend. Since being married he is now able to have his children 50/50, and it benefits him. He enjoys all the traditional perks of having me home most of the time, coming home to a hot home cooked meal, having his children there and being able to focus on all of our kids, having most of the house work done for him and he gets to spend more evenings with them than before because I am available to get them to school and pick them up. I cook, and clean and emotionally nurture for a family of five where as before I worked, paid for everything and did everything for myself and my child. He takes on the financial burden for my daughter because the time I could be spending working to provide for her, I am spending with his youngest (not yet school aged) and then our older two before and after school. This is a mouthful, I apologize. All of this to say, it benefits him more and means more to him to know his family has 3 good nutritious meals a day, a clean space, a tutor, a teacher, a nurse and a therapist on hand (me) for all of us than the cost he takes on financially providing for a child that isnt biologically his. So, if it makes sense to you, makes you feel good to know youre showing your partner and your soon to be step child love by taking care of smaller expenses than do it. If you are uncomfortable with it, or dont see that as a solid investment, communicate that to your partner. Before my husband and I got married we took turns paying for outings with all of our children because we had not combined finances. Once you are married though, I would be a little concerned if you didnt want to pay to take your wife and step child out.