I made sure to put the reference photo I took of her, next to the pencil drawing. I always pencil in first to make sure my values are in proportion.
Also tried to make the penciling darker than I normally do, so it will be easier for you to see.

Here I am just starting on her eyes and the fur around them.
These are my favorite Pen and Ink tools. I am using my usual 140lb hot press watercolor paper in a 9″ by 12″ size this time. Pens I am using are the Copic Multiliner 0.03 and the Sakura Pigma micron .05. Also have my pencil and a high quality eraser to remove the pencil marks.
Bit more fur to the right side of her face and color to her nose.

A Bit more ink to the Cat. Have also decied to keep this just blk and white.

Here is more done on the Cat portrait. Did a little graphite around the right side of the Cats face,,so I can see where I placed the whiskers.

Darkened up the stripes and adding a bit more definition.
Filling in, working on the ears and the sofa she is sitting on.

Finally was able to work on the Cat this morning. Starting to come along now.
Using loose open pen strokes to keep the cat fur looking as real as possible.
For the Sofa I am using cross hatching.

I have darken the back of the sofa just a touch, to add a little depth to it. Have started working on her ruff and upper part of both of her front legs.
Still have the sofa arm to do on the right, to which I will just start off the lightest value I can at first.

Have been working on finishing the fur at the front of her chest and just starting the Arm on the Sofa. Would say about a day away from being finished.