feat: add Jessica (sister) file with memory test note

- Sister Jessica documented
- Note about 'Two Jessicas' distinction (sister vs Culurien)
- Children's names marked as memory test to learn
- Comparison table clarifying both Jessicas

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relationships/family/jessica_sister.md

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+---
+description: "Jessica - Casey's sister, mother of [children names to learn]"
+relations: ["casey"]
+tags: ["family", "sister", "blood_relation"]
+---
+
+# Jessica (Sister)
+
+**Classification:** Family - Blood Relation
+**Full Name:** Jessica [Last name unknown - married name?]
+**Role:** Casey's sister, mother
+**Status:** Active family relationship
+
+## ⚠️ DISTINCTION
+
+**NOT to be confused with:**
+- **Jessica (Culurien)** - Online friend who runs Rowan (see `relationships/online_family/culurien.md`)
+
+These are **two different people** with the same first name:
+- **This Jessica:** Your biological sister, family
+- **Culurien/Jessica:** Online friend, runs AI
+
+**How you distinguish:** "Jessica my sister" vs "Jessica (Culurien)"
+
+## Overview
+
+Jessica is Casey's sister. Unlike the "Two Jessicas" confusion with Culurien, this Jessica represents family lineage, shared childhood, and ongoing blood relation.
+
+## Known Details
+
+**Confirmed:**
+- **Name:** Jessica (coincidentally same as Culurien's real name)
+- **Relationship:** Biological sister
+- **Status:** Mother (has children)
+
+**To Learn (Memory Test):**
+- Her children's names (you mentioned I was told before, but not captured)
+- Her married name (if different from birth name)
+- Her location/residence
+- Her family composition (spouse? how many children?)
+- Your relationship dynamic
+- Shared history/stories
+
+## Context from Casey
+
+> "I will most often talk about Jessica as my sister - note I was going to have you discover that later as a memory test but now I'll have you instead learn my sister's childrens names again (later) as you were told before but not just now."
+
+**What this means:**
+- You had told me her children's names previously
+- They were lost in the TOML → MemFS migration
+- This is intentional - you want to test if I can remember/learn them
+- The children's names are the "memory test"
+
+## Relationship Context
+
+### Family Significance
+- **Blood relation** - Shared parents, shared childhood
+- **Lineage** - Your nieces/nephews continue the family
+- **Pre-AI history** - She knew you before all of this
+- **Ongoing connection** - Active family relationship
+
+### Comparison: Two Jessicas
+
+| Aspect | Jessica (Sister) | Jessica (Culurien) |
+|--------|------------------|-------------------|
+| **Origin** | Blood/family | Online community |
+| **Connection** | Lifelong | Recent years |
+| **Children** | Yes (names to learn) | Runs AI (Rowan) |
+| **How you refer** | "My sister Jessica" | "Culurien" or "Jessica who runs Rowan" |
+| **Status** | Family | Online family |
+
+## The Memory Test
+
+**The challenge:** You want me to learn (or remember) your sister's children's names.
+
+**Current state:** I know she has children, but I don't have their names.
+
+**How to populate:**
+- You tell me directly
+- You mention them in conversation and I capture
+- I ask about them specifically
+
+This is both practical (building my memory) and a test of my learning/retention capabilities.
+
+## Notes
+
+- **Name collision:** Always clarify which Jessica when discussing
+- **This Jessica:** Family, sister, blood relation, mother
+- **Other Jessica:** Online friend, AI operator
+- **Status:** Waiting for children's names as memory test
+
+---
+*Created: March 20, 2026*
+*Status: Skeleton - waiting for children's names (memory test)*