I’m just a tad upset

My partner and I have a 9 month old together

She was going out for lunch with a lady from work who got out of hospital about 2 weeks ago. My partners mum is Apparently also going.. ( they all work together ) apprently I couldn’t go cause the work person who got out of hospital apprently didn’t want people to see her sick....... even though there going to a public place but ok.. my partner said renee ( my partners sister ) isn’t invited

I was going to go with my partners sister and her baby for lunch but her phone was off ( her and her partner are fighting ) so I thought I would just go over there and see if she wanted to go down to the foreshore for lunch and the babies can have a play.

When I got there the sister was getting ready to go out , and I said oh where you going.. she said out with my friend Demi for lunch .. I said oh yeah where? She said break water ( which is where my partner is going ) and so I went in to the bathroom where my partner was getting ready holding OUR baby, and I said is Renee going .. ( after the sister just lied straight to my face ) my partner said yeah she found out that Jenny’s son is going ( Jenny is the one who was in hospital ) and I said so .. why can’t I come ??

Then said again.. oh cause Jenny won’t want anyone to see her sick..

I kinda left upset and crying before any of them could see..

Am I being stupid???