It sounds like you are talking to her about this which is the most important thing. Also it sounds like she likes the idea of a semi-auto. I think you hit the nail on the head with the P2000 (not the sk though, it is harder). It is a medium size which helps with recoil. Smaller guns have more recoil impact because they have less weight (mass) and hit harder so a medium size helps. Also the P2000 has recoil reduction that HK puts in a lot of their guns and that also helps to reduce recoil to where lots of folks feel it has the least felt recoil in this class. With 9mm you also have a wide range of ammo loads and you can choose a reduced recoil load, giving you a third way to help keep recoil under control. And HK is NOT finicky about ammo, it will be reliable with most anything, so it will do fine with some of the lighter, recoil reduction loads.
It also has great controls, easy slide to operate and legendary reliability.
Great gun!