Dreams can be complex and often don't follow logical patterns. The emotions experienced in dreams may not always directly reflect real-life feelings or situations. Dream content can be influenced by various factors, including past experiences, thoughts, fears, and unresolved emotions.
In your case, it's possible that the dream about your mom's death triggered strong emotions due to the complexity of your relationship with her. Despite experiencing emotional abuse and difficulties in your real-life relationship, you may still have a deep emotional connection to your mom because she is your mother. Our feelings toward family members can be deeply ingrained, even if the relationship is challenging.
In dreams, our subconscious mind may bring up unresolved emotions or conflicts that we are dealing with in waking life. The dream might be a reflection of your subconscious processing the feelings and experiences you have had with your mother.
Dreams can be an outlet for our minds to explore various scenarios and emotions in a safe space, helping us process and make sense of our feelings. It is not uncommon for people to have intense or emotional dreams, especially about significant people in their lives, regardless of the nature of the relationship.
If you find that the dream is causing distress or you want to explore the emotions it brought up further, you may consider discussing it with a therapist or counselor. They can help you explore the dream's significance and provide support in dealing with any unresolved emotions or conflicts related to your relationship with your mother. Remember that seeking professional help can be beneficial for gaining insights and finding healthier ways to cope with difficult emotions.