Her growing brain needs the stimulation that touching, holding, comforting, and rocking can provide. Holding her a little longer won’t spoil her- she is crying because she cannot yet control her own emotions. She needs you to help her, to show her how to relax and gain control of her overwhelming feelings. She needs the support of your love and comfort to become a secure, independent, and confident child.
Holding her when she needs to be held teaches her to trust that she will get what she needs. This trust will actually result in less crying! When you use the routines of feeding and diapering to hold her and be close with her, you might find that she is ready to be put down and explore until it is time for another feeding or changing.