Warning a little tmi but Help me settle this debate with my husband.. My husband friend from work…

Warning a little tmi but Help me settle this debate with my husband.. My husband friend from work thinks his wife is pregnant they was intimate on the day she was ovulating and she finished on her vagina (I know tmi sorry) I told my husband that it's impossible so he goggle it and there is a lot of not possible and possible I'm so confuse now