Asking for a friend

So my friend was on depo shot but stopped since last year(has irregular periods)so she had a period on the 14th of january and it finished the 19th

She had unprotected sex the 21st using the pull out method and sex again on the 22nd with her boyfriend n he came in here

If she had gotten pregnant(still not sure)

Who is more likely to be the dad ?!?! 21st dude or her bf ?