STB,
Sorry if I wasn't clear. I never thought you should be concerned about yours or Sue's relationship with Frank, I just thought that he might feel a little different about a new relationship for himself now after experiencing a weekend with friends and family and Sue. Not that he will be wanting Sue herself in that position (I suppose a man can wish ..), but just that the experience might just have stirred feelings for a new proper girlfriend for him. Thing is, if it did, I'm not sure who he would admit it too. He might think he risks losing Sue if he mentions it. Just be interesting to see if there is any hint of a softening of his attitude in that area when you see him.
Sorry if I wasn't clear. I never thought you should be concerned about yours or Sue's relationship with Frank, I just thought that he might feel a little different about a new relationship for himself now after experiencing a weekend with friends and family and Sue. Not that he will be wanting Sue herself in that position (I suppose a man can wish ..), but just that the experience might just have stirred feelings for a new proper girlfriend for him. Thing is, if it did, I'm not sure who he would admit it too. He might think he risks losing Sue if he mentions it. Just be interesting to see if there is any hint of a softening of his attitude in that area when you see him.