You don't have to do anything except support the relationship. She has to resolve this on her own. Nothing will happen that she doesn't want to happen. Don't make this bigger than it is. Eventually she will tell him she isn't interested. She probably is trying to take the "nice" road, but eventually she will have enough. If she told you about it then she obviously is not interested. Let her resolve this. Anyone even nice people get fed up. Allow her to do this. She will be fine. If he crosses the line, then make a decision as a couple. Right now he is just talking.
If this is helpful press accept
thank you that was very helpful