It is NO fun being taken for granted, this I do know.
I was put in a similar situation several years ago....and had I not stepped up to the plate and taken my 3 nieces in, they would have been turned over to foster care and probably would have been split up.

Their mother was in jail, she was a crack head and wreaked unbelievable havok on our family. I took her girls in because I genuinely cared for them and did the best I could to keep them together, gave them birthday parties and bent over backward just to try and give those poor girls some semblence of normalcy and then one day out of the clear blue sky, their uncle (the brother of the crackhead) from another state pulls up in the driveway and took the 3 girls away.
No 'thank you' ..... nothing.
.....and this all took place in the wake of grief from losing my brother to a car wreck.
I don't know how I kept my sanity when I look back on all that.
Now that it has been several years (8) ..... i can sit back and know that I did a good thing. There was a lot of sacrifice involved, but I know in my heart that I did a good thing and I can carry that with me. I keep it tucked away in a corner of my heart.

Please don't let that depression cloud get the best of you Pooh....
Do whatever it takes to stay above that cloud.
You do so much for so many people. There will be reward in all that you do....(probably not from inlaws ), but there WILL be reward.
Tuck it safely away in your heart and keep it there ok.


Rae