Help needed for coworker interaction

I do not have autism but my coworker does. I have to work closely with this person. If this is not the correct subreddit, please accept my apologies. We are in each other’s personal space and have to touch each other and the job can be very stressful at times. I am mindful of noise and do not speak unless absolutely necessary when our job becomes very stressful or we have to be in close proximity. Lately, my coworker will start screaming at me that they are overstimulated in these situations and will become very angry with me. I genuinely do not know how to handle this. We cannot do the job alone. It has to be a two person job. What can I do to help this situation? I asked and they asked me just to excuse it and not try to change partners because they cannot work with the others. Any suggestions?