Either guy could be the father.
How do you know when you ovulated?
Your period started on November 16. You had sex on November 24 or day 8 of your cycle. You will normally ovulate between days 11 and 16 of your cycle. Sperm can survive about 5 days.
You had sex with a condom BUT you then had sex without a condom. Any semen (containing sperm - not precum) would be in his urethra. Just inserting his penis would squeeze the semen into your vagina. It only takes one sperm.
You also had sex on days 15 and 16 of your cycle. The egg is viable for about 48 hours.
You timed it just about perfect for either of them.
Dates are based upon when your LMP was. Why? Because most women know exactly when that was.
You'll need a DNA test to be sure. Hope it helps.