I had an affair partner, she was married, that I impregnated twice. Those children are now young adults.
The impregnation was deliberate on both our parts.
KK and I have done numerous insemination / impregnation fantasy realization and role-play scenarios, but without the possibility of her becoming pregnant - we lead the encounter partners to believe that she was fertile, and that we intended one of them to impregnate her, but it was just fantasy to intensify the sex.
I felt a sensation of power and control when I impregnated my affair partner. The thought of filling another mans’ wife with my seed, impregnating her, made the sex much more erotic and thrilling.