Duckman (1994)

S3E5 Sperms of Endearment

Bernice, Duckman's sister-in-law, feels the urge to become a mother. After a few unsuccessful attempts at dating, she opts for artificial insemination. However, a mix-up combined with an excess of, well, 'donation material,' leads to her receiving Duckman's genetic contribution. Chaos unfolds as Duckman and Bernice prove to be completely mismatched in every possible aspect.