Sorry, but that's not how cumming works. You cum in the vag and it makes its way into the uterus.
This has been so popularized for a long time, there is no helping it. So many stupid nonsense scenarios in porn.
Semen being sprayed directly into the uterus and thousands of sperm cells flocking it at once. The penis entering the uterus through the cervix and then the above example. Girl holding a positive pregnancy test immediately after sex. Girl holding a condom pack in the mouth, while having unprotected sex, cuz it looks naughty. Guy ejaculating so much that the girls stomach bulges out though his testicles are smaller than a fist. Complaining a guy did not pull out before ejaculating during unprotected sex, unaware of the concept of precum. and many many more......
I suppose drawing the real process would be boring. Artistic freedom, I give them that.