Yes, please give it a try. The youngster is still sub-teenage and looking for adult guidance.
Please be aware that guinea pigs don't do play time; ever single meeting is a full on bonding session. However, I would separate during travelling after just a short meet at the rescue in case one of the piggies panic during the journey.
Otherwise you bond and sit it out unless the bonding goes haywire. You can give them a night in the divided bonding pen if you have one to get used to each other and get their bearings a bit; Peggy is old enough for that if you have any apprehensions but once you have committed to the bonding proper, you need to see it through.
Here is our illustrated bonding guide, which takes you through every single stage from the run up until the post-intro dominance phase with respect paid to the attendant behaviours and dynamics of every phase and special chapters on baby bondings and sow bonding. You can also find several videos that feature sub-teenagers during bonding.
Bonding and Interaction: Illustrated social behaviours and bonding dynamics
Ultimately, it is down to whether Kona and Peggy gel and want to be together. That is the par you can never predict.
All the best!
Hope it’s still going well x
match! They look very contented together 
) to this. It's a lot to process 
