Coko,
I would say that it's not so good to give other people your meds, Meds for depression should be prescribed by only a P, and you don't know the side effects if someone has them. I would say that your brother needs to have a serious talk with his inlaws about their daughter, she needs T and needs to be helped for the depression, it can linger for years and if she's suffering daily then it will ultimately negatively impact their new marriage, which noone wants to see a new marriage in trouble. Sending positive vibes your way. I hope things work out for them.