Give her time and try not to put the two together if/when you are not available to intercede for your older dog.
Your puppy isn't going through the teething and rambunctious stage yet, and when he does it's not going to be a lot of fun for your older dog.
I'm going to assume she's a lot like my Jacks when I first brought the puppy home. That first weekend was very stressful for the poor guy, but 3 weeks later the only time I have to hop in to help him is like the early mornings or late nights when he wants to SLEEP and the pup is trying to chew on him. And about now, he knows I will either come to his rescue if I see the pup doing something I don't like or he will come to me to ask me to help him.
I guess a little warning - your young puppy is going to get a bit more of a handful for both you and the other dog. When they are 8-9 weeks old, they really aren't that bad. With every week past 10 weeks and going towards 4 months old, they are teething and starting to sleep less....
I feed both dogs the same time and together, but on either sides of me. There was some resource guarding from the older dog the first day or two, but as he adjusted to having a puppy hanging around with him all the time and he recognized that I would never just put the food down and ask him to fend for himself (I am there to keep the puppy out of Jacks food), he's happy as a peach with the new arrangement which means he is fed breakfast earlier and gets to go out for potty a LOT more frequently throughout the day.
And I pretty much have been keeping both boys together when we do fun and positive things like meandering around outside, walks, shopping, sleeping, eating (me eating), and even training.
My initial plan as far as training the puppy was to keep both dogs completely seperate. That backfired when I saw how much stress that caused my Jacks. So instead I adapted the training so that Jacks saw me training the puppy as part of me training him
. So he hangs out and does stays and earns treats for just sitting there while I work with his baby brother right in front of him.
@Potty training - I was bragging that our Bertie had gone 2 weeks without having a SINGLE accident and I was starting to assume he was going to be like Jacks who went almost 12 months before he had his first accident in the house due to a UTI.... and then he had a VERY BAD EVENING. LOL.
And though that evening may have happened because of the stress and discomfort of having his second round of vaccination earlier that day, it just reminded me that a puppy is not potty trained unless he has gone 2 months without a single accident.
We are now back to me jumping up and running him outside every time he walks a little funny around the room, sits by the door and looks at me, squeaks.... 5-10 minutes after eating, drinking, playing, sleeping....