This is baby-sitting — Anthony Weiner-style.

While his wife, Huma Abedin, travels the country campaigning for Hillary Clinton, the disgraced ex-congressman has been sexting with a busty brunette out West — and even sent her a lurid crotch shot with his toddler son in the picture, The Post has learned.

The stay-at-home cad shot the revealing photo while discussing massage parlors “near my old apartment” shortly after 3 a.m. on July 31, 2015, a screenshot of the exchange shows.

Huma is now filing for divorce.