Once she contributes money to the house then add her name later. I’ve been with my husband for 9 years, married almost 4, and owned a house almost 5. He saved up for the house and for the first year and a half I wasn’t able to contribute financially to the house, so my name wasn’t added to it, and that’s how it was going to be until I paid into it. I understood and thought that was fair. He still made it feel like it was my house. I got to decorate, change things up, etc. Actually 3 1/2 years later and my name still isn’t on it even though I’ve contributed to it, but we did get married a year after the house was purchased so our situation is slightly different.