Thanks for the update.
It isn't easy - partly because children think very differently, and express themselves with an instant honesty that can be cutting, although they are oblivious to it at the time.
Tthe cuddles are important, and you have to tread a fine line between being available without crowding them, and being able to be pushed away sometimes. That's children - and as a stepdad of two with a third daughter between us who is now nearly eighteen, I can tell you that it's just the same with biological children as well!
What you have to avoid is over-analysing things in an adult way, which is perfectly natural, but as children, they speak and act, and the instantly forget!
Our eldest daughter has a ten-year-old who has gone off to camp with the school for a week, and while she frets and worries, our grand-daughter will be having a great time, i know because we fretted when she went, and she had a fabuulous time!
You are doing exactly the right thing - taking it slowly, and being patient, and you will be rewarded richly as your rleationship with the children grows.
Just one thing - you MUST make sure your partner backs your discipline at all times, even if he believves you are wrong, he must back you in front of the girls, and disucss it afterwards with you alone. They will try and play you off against each other - that's what children do, and if the sense you are insecure because you are not 'mum', they will run you ragged!
Be firm, be fair, and you will be loved.
It's wonderful isn't it!!!
A x