Ok, made out some of the advert:
The father is merely asking his daughter if everything is alright with her marriage, to which she answers her husband is just "busy" these days.
Apparently the father does convey the fact something is "wrong" with his daughter's marriage to his wife, who is seen in the smaller pictures having a frank chat with her daughter the next day. The mother explains that persperation odour on undergarments can spoil a marriage. The mother further explains the daughter should launder her underthings after each wearing, and dresses often.
Apparently the mother's advice works, since the letter shown at the bottom of the advert is from "Peg", thanking her mother for the advice about Lux soap. Everything is "perfect" in her marriage now, and "Don" is "more in love" than ever. The girl even invites her mother over to dinner next week.
For what it is worth, proper young ladies have been schooled for ages that the proper way to care for their underthings was to launder them after each wearing. Hence ladies bathrooms all over the world with all manner and sundry of undergarments hanging dry. Even the book "Home Comforts" recommends laundering underthings after wearing.
For Lux soap to sponsor such an advert makes sense. Woolite, Kirkman Flakes, Ivory Snow, and others were all marketed for laundering fine washables by hand.