young or small?

Question

suppose my cousin has three daughters and she came to my place with her daughter who is eldest in age....what should i say
1. my cousin came with her big daughter
2. or my cousin came with her eldest daughter
3. or anything else

and what if she came to my place with her second daughter who is neither eldest nor youngest....what should i say
1. my cousin came with her second daughter
2. or my cousin came with her middle daughter
3. or anything else

and what if she came to my place with her youngest daughter who ....what should i say
1. my cousin came with her youngest daughter
2. or my cousin came with her small daughter
3. or anything else

thnx in advance

Answer 1

1. My cousin came with her eldest daughter that day.
2. My cousin arrived with her second daughter in tow.
3. My cousin came with her youngest daughter.

Answer 2

2. My cousin came with her eldest/oldest daughter.

2. My cousin came with her second eldest/oldest daughter.

1. My cousin came with her youngest daughter

Answer 3

my cousin came with her eldest. my cousin came with her second born daughter, my cousin came with her youngest