Try to stay out of the conversation with your SIL and H. You'll be glad you did at a later date. He has told you it wasn't you, but when pressed, it'll get ugly. He needs a fall gal
For the insurance - you may want to double check with hr. Most companies also have a qualifying event like separation and also have an open enrollment period. That is likely coming up in the next few months. Until then, you're right, he is likely required to keep you on the insurance. The L will know how that works as well.
Kook is right.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."