If a male nests with one female and then abandons her to search for another receptive female, the chances are fairly good that he will have a difficult time finding a new mate. Probably better to stay and help rear young. In fact, female synchrony may evolve to restrict male options and force them to invest in paternal care. In mammals, monogamy is rare since females nurture embryos in utero and feed them milk. Male assistance is less valuable so he can do better looking for other females.
Exceptions are some carnivores where male can provide food and protection.
This makes it more costly for males to search for new mates and results in their investing in current female and her offspring. Silver-backed Jackals are truly monogamous. Males feed young. Wolves and hyenas, dominant female inhibits other females from breeding. Usually mates only with dominant male.