with the introducing too early, my brother was introduced very early to his fiancé’s children as she, at the time, was a single mother with two young children, and the father wasn’t involved and lived in another country: however, what they did do, was make it appear to the children that my brother was just a friend and nothing more so as not to confuse them - now, 2 years down the line, they have their own child together and the other children call my brother daddy and he is their dad, no doubt about it (as the bio father is well and truly not involved, not even met the youngest ), but i do think that if charlie had to have them meet, she could’ve pretended he was just a friend for harlow’s sake, until it was something more serious - and of course, brett is involved. But no matter the circumstances, there’s always a way around it, such as having it appear they’re just a friend in front of the child