Should I get rid of one of my cats?

I'm having my first baby in the beginning of June this year. My boyfriend and I live in a 1 bedroom with our 3 cats. About 3 months ago two of my cats who are brothers from the same litter started absolutely hating each other. Loki my favorite Stays in our bedroom and won't come out. Hades will try to come in but it's an immediate brutal cat fight between the two of them. They both get along with my first cat lemon most of the time.

With the baby coming I feel like I'm going to have to give away hades but I'm pretty sure he has attachment anxiety connected to me which makes me feel shitty for thinking about giving him away. I absolutely won't give up Loki and Lem doesn't have an issue with either so giving her up is won't help my situation. Giving one of my cats up hurts my heart and makes me feel like a shitty pet parent, but I'm doing it to be a good mom to my son. What's your opinion?