Rant! But I need advice

So this weekend has been hard for me. I am 28w2 days and all this drama is to much.  It started off with guys showing up to my house threatening my husband because his sister lied to them. I got so upset when these guys threatened him by saying if the wanted to the could break into my parents house if he wanted to. And I made it clear to that guy that if anything happens to my father and mother's house I will personally go after them and they will pay for what they do. Well with me yelling my dad got worried and ended up hours later in the hospital with high markers in his heart due to stress and stressed kidneys ( he has failing kidneys). Well the whole time my moms adopted daughter who is 36 years old ( I stopped claiming her as a sister because of her way of treating me in the past since I was a child) was out of town at a car club meeting having fun and drinking. My mom had told her before to not leave because my dad was sick and she didn't care. Well I let her know threw a text because she didn't answer my call to let her know my dad was in the hospital. She didn't show up until Sunday night at the hospital. And when she got home she start to fight with me over closet doors (she took out of her room) that my husband and I put in her room because they were blocking the entrance for the paramedics. Long story short I am canceling my baby shower because my moms  daughter was going to throw it for me and I don't want nothing to do with her and I don't want my child to have anything to do with her.  Do you think it's tacky that I am canceling it after sending out invitations? Plus my dad is super sick and my focus is on him.