Cold tap water is not a good living environment for sperm; Their lifespan in such conditions is (according to unofficial research) several minutes. Assuming that the semen would be in such a place - there is no possibility of getting pregnant in the described situation. Apart from the survival aspect of sperm, the vaginal entrance is protected by the outer and inner labia, which prevent random fluids from penetrating into the body.

In order for fertilization to occur in a traditional way, unprotected intercourse with ejaculation in the genital tract of the woman (who must have fertile days at this point) is necessary.

I encourage you to read:

https://www.gdziepolek.pl/blog/edukacja-seksualna-o-co-pacjenci-anonimowo-pytaja-farmaceutow

In case of any doubts, I encourage you to use the teleconsultation with a gynaecologist - the service is available on our website in the e-visit tab:

https://www.gdziepolek.pl/telekonsultacja/z-ginekologiem