Unlike other sports, particularly those involving bats and balls, where a certain level of co-ordination is necessary, and a lot of practise required before you become proficient, running is simple. It’s just walking with a bit more punch.
Why not invite her on a walk with you? (Even someone with mild Ataxia or dyspraxia can manage this).
On this walk you can talk about all this and find out what is at its root. Tell her how amazing it would be to be able to run together one day. Invite her to do this again and this time, encourage her to jog incredibly slowly just for a tiny bit of the way.