Connecting through OBiTalk, you should be able to look at the last 10 calls made from the OBi device. This is exactly the same as the last 10 calls shown when directly connected to the device.
Why not setup the OBi device to automatically route dialed calls to the UK through SP2, without the need to dial **2. The forum has many examples as to how this can be done! That way, your wife does not have to remember to dial **2 to select SP2.