Not for Immediate Relatives
The instructions for the I-130 state as follows:
2. For whom can you file?
A. If you are a citizen, you may file this form for:
1) your husband, wife, of unmarried child under 21 years old
2) your unmarried child over 21, married child of any age
3) your brother or sister if you are at least 21 years old
4) your parent if you are at least 21 years
B. If you are a lawful permanent resident you may file this
form for:
1) your husband or wife
2) your unmarried child
NOTE: If your relative qualifies under instruction A(2) or A(3)
above, separate petitions are NOT required for his or her
husband or wife or unmarried children under 21 years old.
If your relative qualifies under instruction B(2) above,
separate petitions are NOT required for his or her husband
or wife or unmarried children under 21 years old. These
persons will be able to apply for the same type of immigrant
visa as your relative.
END OF QUOTE FROM FORM I-130
Based on the above quotation, it is apparent that spouses and unmarried children under 21 years old of relatives qualifying under sections A(1) (husband, wife, of unmarried child under 21 years old of US citizens), A(4) (parents of US citizens over 21 years old), and B(1)(spouses of GC holders) must submit separate petitions.
Jim