If you're doing that calculation and conclude that she is somewhat likely to end up divorced and with less income, because she is a woman, then... congratulatio

If you're doing that calculation and conclude that she is somewhat likely to end up divorced and with less income, because she is a woman, then... congratulations, your algorithm fulfills the definition of "sexism". And just to be clear: It is not sexist to point out that women make less money on average than men. It is sexist to treat individual women worse than men because of this general expectation, without factoring in any other information.