Dreams involving animals, especially those like cats and tarantulas, can often symbolize various aspects of your emotions or situations in your life. The cat with tiny kittens may represent something nurturing or innocent, while the act of killing some of the kittens could suggest feelings of guilt or regret about something you've done or decisions you've made that impact others.

The transformation of the cat into a tarantula could signify a fear or anxiety that has developed from a situation that initially seemed harmless but has become threatening. The tarantula, often associated with fears or feeling trapped, might indicate that you feel overwhelmed or pursued by something in your waking life.

Your father poking you with a knitting needle could suggest feelings of being hurt or pricked by family dynamics or responsibilities. Knitting often symbolizes comfort and warmth, so this action might imply a disruption in that familial comfort or a feeling of being judged.

Overall, this dream seems to reflect internal conflicts regarding family relationships, responsibilities, and perhaps some underlying fears or guilt. It might be beneficial to reflect on your current emotional state and any family dynamics that could be contributing to these feelings. Consider discussing your feelings with someone you trust or journaling to explore these emotions further.