Sol, maybe he wants to marry her for the MONEY! In a sense what you've written helps a bit here. I'm thinking part of her anger maybe that she sees you as screwing with what she considers family business. She's trying to get sister set up in a better life, you aren't supporting her (nor should you be!). Blood is pretty darn thick! So now OM could become your BIL, and after a few months they'll dump each other and go their separate ways. So, while understanding your anxiety, I'm not sure how this changes what YOU should be doing regarding your M. You still need to DB just like everybody else. You can't DB based on what you think might happen in the future. You DB for now. What can you do today that might make a difference. Don't base DBing on your anxiety about what might happen tomorrow. But, that's just the opinion of a guy whose not in your shoes. You have to decide what you can live with. Keep us posted.
