I need another moms opinion!

Am I being selfish and unreasonable for not letting my mom take my son back to California for a month while his dad is on deployment and I work overnights? We live in Virginia now and my boyfriend is actually getting ready to go on deployment. I’ve asked my mom kindly if she would consider staying with me for 2 weeks tops and I will pay her bills and plane ticket if she did to watch out son and spend time with him because for the first 2 weeks my boyfriend’s grandma wants to come here and help us out. But my mom said no since she rather not take time off work and would come to Virginia and pick him up at the beginning of my boyfriend’s deployment and bring him back at the end of it meaning I would have missed my son’s bday too if she did this plus she would be bringing my son to other relatives when she has to go to work too (and I know my aunts and uncle will be busy around this time too since it is close to the holidays and one of my cousins actually just had a baby so my aunt and uncle will for sure be out of town to be with their grandchild). I told her no because I am not comfortable with that arrangement since I’ll be across the United States from my own son and much rather he be here and have her here too. She started to get upset with me and called me selfish and told me that if I was planning to have a second child, I better not ask for any help because I was already being selfish and keeping my son away from her. Am I really being selfish for not wanting my child to be so far away and wanting to cut her and whoever else agrees with her about my decision to not send my son to California off (would be my sister because she started texting me about it —- she doesn’t even live near my mom)