Any thoughts po?

Ay sis, totally normal yan! A few of us in our circle have live-in partners with kids from before, and honestly kahit gaano katagal, most of the time ang bata pa rin ang tatatak sa "Papa" or "Dad" sa biological father niya, that's the person who raised them, kaya it's hard to change pa. It doesn't mean anything about your relationship with your partner, it's really just how the kids grew up calling their dad, and forcing them to switch names actually causes more drama than it's worth, trust me!