So me and my partner and my two year old boy have planned to go to the zoo tomorrow. His sister came over to see me today as she is having a really hard time and has been telling me she is depressed and on the verge of a breakdown (she is in the middle of getting out of an mental abusive relationship). She has 2 kids herself aged 5&6 and our kids get on amazing. Anyway during the conversation I suggested she gets out the house more and maybe have a day out with the kids. This lead me to inviting her to come along to the zoo. She agreed and invited their other sister to join as she has a 2 year old also. I told my partner that his 2 sisters and the kids are going to the zoo tomorrow as well and we will see them there. Well he exploded at me saying why the hell did I invite them! Saying he cba with all the kids (baring in mind they all get along amazing and our boy is so happy when he sees them) which are also his nieces and nephews. I just thought I was being supportive to his sister to try and get her mind off it.. he hasn’t spoken to me all night and now I don’t even want to go! (Him and his sisters get on fine btw) Am

I wrong for doing that??