I am presleeve and have chosen to keep it between me and my husband and best friend for now. I will probably tell my grown children when I get a surgery date but my husband really doesn't want to let them know. He doesn't want them worrying about me. He thinks we can tell them afterwards. I know if they find out later they will feel hurt. I'm sure my kids will be supportive and understanding and I will feel guilty not telling them prior to the surgery. I have time to get my husband to my way of thinking..I hope.
Now my parents, brothers and hubbies sister, I have no problem with keeping it a secret from. I rarely see them because they don't live nearby so it would not be hard to do. My brother just older than me is very judgmental when it comes to Weight loss. He used to be 350 lb in high school and lost it on his own and pretty well kept it off since 1978. He sees no reason why anyone should have surgery for it. My parents live with him so that is why I hesitate letting them know since they would likely wind up telling him.
I am self employed from home so there are no co-workers to tell.