Many thanks for your replies.
Difficult to really know what to do!
I was really looking forward to running this race but fear my sister running will be too much of a distraction.
I really don't want to run with her as what happens if me or her wants to go a bit faster,or she wants to walk for a minute etc etc!The list is endless.I've also never ran with anyone else before.
She hasn't entered but she can enter on the day,she emailed the organiser to check..just hope she pulls out as although she goes to the gym she hasn't been running outside nor in a race before.. I hope I don't sound like a selfish person cause I'm not but was looking forward to running this-I've been running four times a week since my RFL in preparation so its a bit annoying at the last minute to have this complication..only my second race so I'm a little nervous too as it'll be a much smaller field than the RFL..
determined to enjoy it though as thats what its all about!!