Especially, keep your hands clean. I can see you are aware about not handling yourself and passing any liquid to her, but hands in general have lots of bacteria on them, and should be washed before they touch a sensitive area that can get infections.
Hi 007, Sorry forgot to add this and most important bit, never let precome get near you g/fs Vagina at any time or her, reason its in this that we have our strongest swimmers, sperms that is, and thats a fact.
Good Luck
Hi 007, we meet again, OK as long as you fingering her and have not touched your p***s then you should be OK, and the same for her, if shes playing with your p***s she is not to touch herself.
But please make sure your hands are clean and your finger nails are clean and short with no snags, always keep your nails that way, as you should always think of your g/f from now on, and not you.
Good Luck