Yes, but not from SSI.
Yes, if there is a valid court order for child support and/or child support arrearages.
Social security
There is no such thing as "social security child support." If the child's parent(s) is eligible for Social Security, the child is probably eligible, also. In such a case, the child's benefit is considered child support. If that benefit exceeds the amount ordered for child support, the obligor does not owe any additional payment.
Social Security is income for purposes of determining amount of child support.
Yes, but child support received must be reported to Social Security (or it's fraud).
Your Social Security eligibility is not affected by your receipt of child support. One is for you; the other is for your child.
Yes
Child support is an obligation, social security is a source of income. They really have nothing to do with one another. If you are asking if she can garnish your social security, the answer is yes. Section 459 of the Act (42 U.S.C. 659) allows Social Security benefits to be garnished to enforce child support and/or alimony obligations;
As he's on SSD, none at all.
yes
Social security payments for the husband stopped upon his death. If the child is under 22 (?) and is still in school, there may be payments due to the child. If you are receiving checks on your own behalf as a widow, those checks are not subject to child support payments. You can call Social Security directly or look online for this information.
If you die you cannot possibly pay child support. The custodial parent needs to apply for Survivor's Benefits through the Social Security Administration.