Hiya a warm
to Purrs
Munchkin must be ya cats name? Great name
Yes she is getting comfort from you basically simulating what she would have done with the mum cat by kneeding and suckling to simulate milk as a kitten.
She sees you as the mum
Heres a bit from a book called Cat watching that explains a similar thing
Why does a cat trample on your lap with its front paws?
All cat owners have experienced the moment when their cat jumps up and with cautious movements settles itself down on their lap. After a short pause it starts to press down, first with one front paw and then with the other, alternating them in a rhythmic kneading or trampling action. The rhythm is slow and, deliberate as if the animal is marking time in slow motion: What does all this mean?
To find the answer it is necessary to watch kittens feeding at the nipple. There the same actions can be observed, with the ' kittens' tiny paws kneading away at their mother's belly. These are the movements which stimulate the flow of milk to the nipples and the dribbling is part of the mouthwatering anticipation of delicious nourishment to come. This 'milk-treading', as it is called, is done at a very slow pace of approximately one stroke every two seconds, and it is always accompanied by loud purring. What happens when the adult pet tramples on the lap of its human owner must therefore be interpreted as a piece of infantile behaviour. It would seem that when the owner sits
down in a relaxed manner, signals are given off saying to the cat, `I am your mother lying down ready to feed you at the breast:' The adult cat then proceeds to revert to kittenhood and; squats there, purring contentedly and going through the motions of stimulating a milk supply.
From the cat's point of view, this is a warm, loving moment. To the cat people are clearly maternal figures, because they do supply milk (in a saucer) and other nourishment, and they do sit down showing their undersides in an inviting manner. People can react rather differently, once the juvenile reaction of milk-treading is given, they suddenly and mystifyingly thrust the pseudo-infant from them upsetting the cat.
This is a classic example of the way in which interactions between humans and cats can lead to misunderstandings. Many can be avoided by recognizing the fact that an adult domestic cat remains a kitten in its behaviour towards its pseudo-parental owner.
