If you are able to work it does seem like it would be healthier for you to spend less time there. You seem like a wonderful compassionate caring person. Have you ever considered looking into becoming a Home Health Aid? If you work thru an agency, they usually provide some training and direct you to certificate programs that are usually only a few sessions and are realitively cheap..some companies will also pay for these programs. Another way is to work independently. Families who need someone to help out eith their loved ones, will often post on craigslist, or ask around their local community/ senior centers. Sometimes this is listed as home health companion. I would reccomend inquiring at a senior center about opportunities. If you think this is something you would be interested in. I am a live in hone health companion for a family member and I find it to be such a blessing. Alot of the elderly who are not yet atvthe point that they need nursing care end up going into assisted living because their families are not able to afford the time to be around on a daily basis. Alot of theres individuals would kuch rather still be in their own homes and really just need someone to lend a hand around the house, prepare meals, run errands, sometimes transport them to and from appts, and most importantly have a kind compassionate person to spend time with them. Hope this is relavant helpful info for you. And as far as your sister in law is concerned.. even if her behavior is obnoxious she obviously has some self esteem issues to need to constantly be the center of attention. I think if you look at the dynamic from a slightly different angle.. you may just see an entirely different view. Hope all works out for the best. Looks fade, but inner beauty is eternal.