Hi messe, like others have said this is an awkward situation to be in.
When I was with an abusive guy, everyone was being honest with me, but I didn't want to hear or believe it, although I knew they were right, and were only thinking of me in the long run.
She is lieing to herself at the moment, don't reinforce this by sugar coating it for her, as that will just give her justification in her mind that he is actually an alright guy.
But he is not, be honest with her for her own good.
One day she will thank you for it.