Can twins have different fathers?

THE SHORT ANSWER: YES.

It’s extremely rare, but it can happen if a woman releases two mature eggs in one ovulation cycle. If she then has sex with two men within a very short period of time (while ovulating), two different sperm from the two different men can fertilise two different eggs to conceive one set of non-identical twins. Because they don’t share the exact same genes, it’s possible for these twins to look markedly different.