For the first 24 hours that we had Muffin, she hid behind the couch and cried. We tried talking softly to her and getting her to come out, but it was obvious that she was terrified of us. So we left her alone. When she’d meow, I’d reply “Muffin” in a sing-songy voice (the way I call her), and it started being a sort of game - she’d call, I’d reply. But I didn’t try to touch her or approach her or teach her. That evening, we locked her in the laundry to sleep.
The next morning, she was pleased to see me, and snuggled up to me. During the day, she kept calling (I guess she was trying to call her mother), and I kept answering. She was less skittish, and settled in quickly. The second day we let her approach us for cuddles, and didn’t go after her.
The third day, she was relaxed and happy. We played with her, we cuddled her, and she wouldn’t flinch when we walked over and picked her up.
Now, she’s confident and not at all like the scared little kitty who cried and hid on her first day here. She still calls me from time to time, and knew her name by the third day here because of our game. She likes to cuddle when I’m at my computer desk, but best of all she likes to cuddle on my bed. I know that’s what she wants when she jumps on my lap, jumps straight off again, goes into the hallway, and calls and calls and calls.
So, just let the kitten be. Feed it, speak gently to it, but let it approach you. It just needs to become comfortable in your home and with you and your wife.
Oh - and Muffin had me in tears when she was about 14 weeks old. We added another kitten to the household so Muffin wouldn’t be lonely, and she HATED it. She wouldn’t speak to me for three days, and bit and scratched me whenever I tried to approach her. After three days, she calmed down, and came over and kissed me, and we’ve been friends ever since. Plus, she loves her pet kitten, and they’re best friends now.