Will child support affect social security benefits

by Dale
(Florida)

I live with my girlfriend and we recently determined that her 14 year old daughter is MINE.
She is widowed for the last 2 years...and which she is receiving social security payments for OUR daughter and her 2 other children.
We are NOT married...just live together.
I am paying child support for another child (son) and am the non-custodial parent.
If I start paying child support for our daughter:
1) Does that affect or cease the social security payments received?
2) What is the percentage/breakdown of child support between the 2 kids? (Daughter is 14...the son is 12)