I need help , seriously ! 😔

Sorry if I’m posting in the wrong room. Just needing some advice!

Okay so I’ve got a lot going on. Exactly 2 months ago I lost my mother to cancer. Me and my sister have always been close and did a lot together and talked pretty much everyday. But after our mom passed we kinda drifted apart, she was doing her own thing and same with me. Now here’s the problem.. 2wks ago we got into an argument over something very stupid. She said some horrible things to me and I had a panic attack and cried for days over it. She told me to delete myself out her life, she’s done with me, I’m rude and an ass hole. She said fuck you and never text her again. She also said our mom even thought I was an asshole. It seriously broke my heart.. so I stopped texting her and just left her alone like she asked. So here’s where I’m having trouble, I have a 16 month old son. She does love him, but she would never babysit for me ever, like for a doctor appt.. nothing! She would never ask to take him for a little bit to her house or anything. And she wouldn’t ask me to come over to hers to spend time there. She would see him maybe once a week at my house for a little bit that was all. Now she’s having her oldest daughter text me and ask if my baby can go to their house for a little bit so she can see him. I said no, he doesn’t go anywhere without me. And I’m not going there. Am I wrong for saying no? She never asked before to take him and would never help me with him when I needed it. She hasn’t even apologized to me, only said that she feels bad for saying it and wishes I had more compassion for her and she’s going thru some things. Which she’s not the only one.. I lost my mom too and I would never talk to her like that. I told her she shouldn’t of said them things to me if she knew she was going to regret it. And I can’t just get over what she said to me. So am I in the wrong? My son literally never leaves my side he’s with me 24/7! I kinda feel bad for saying no, but also there’s really no reason to let him go. It’s not like she asked to take him any other time.