I Don't remember really well because It's been years since I've seen this, but heres the descriprition (ENGLISH IS NOT MY FIRST LANGUAGE)
It's situated in the past times, a woman marries a guy (without wanting) and goes live in his mansion, she takes a maid that worked in her house to live together in the mansion of the man, it's later showed that the woman and the maid have an affair since before marriage, so they have a lot of sex. In the end the husband goes away, and the couple of lesbians have a baby
I'll put some details here: the husband and wife have a sex scene, i don't remember if the maid was actually a futa, i think not, because the baby had me surprised and it's probably from the husband, for last, the husband saw them having sex, and i think he smiled idk, but he did go away so i think he smiled happy for lesbian sex