What to do???...

Okay so my fiance and I moved in with this couple and everything was going great but she has been being a huge bitch when we've paid her, helped her buy groceries with our food stamps and help with the kids and have been a carin g listening ear. Well that all stopped yesterday because her WATER got spilled cause the fridge was jam packed and she starts crying and yelling hysterically and I was on my way to take a nap w my man and we were made to feel like the most selfish ppl in the universe and this is very hard because my being pregnant is making me even more sensitive than normal and I always have had anxiety panic attacks what should I do to not take this personally and not let it upset me all I've done was help with her kids and helping her and this is what I get..smfh😔😔