In Neil Simon’s The Heartbreak Kid, a classic movie of the 70s, the protagonist is a charming sociopath who divorces his newly-wed wife, on their honeymoon, to go chasing after a woman, Kelly (Cybil Shepherd) he just met. When Lenny (Charles Grodin) admits to the woman’s parents that he has just split up with his wife of only three days, and intends to woo their daughter, the father (Eddie Albert) is furious and he tells Lenny to get the hell away from his family. Undeterred, Lenny actually follows them to Minnesota (crazy behavior) where he shows up at their doorstep, confronting the father again - who tells him, again, to get the hell away from his family and never come back. Finally, after eloping with the blonde dreamgirl, she manages to convince her parents to have Lenny over for dinner.
At dinner, Lenny gives a dramatic, pompous speech about how much he loves the “simple, honest” food at the dinner, and how he wants to get back to the land, and how “we’ve taken enough out of this country, and it’s time to give something back,” etc etc. The mother completely falls for it, apparently, but the father only pretends to be impressed. After dinner, Lenny goes into the father’s office for a private meeting, wherein Mr. Corcoran tells him he’s a fraud and a hack and a bastard, and that he will NEVER let him marry his daughter. He even offers him five thousand dollars to get away from his family - when Lenny refuses, Mr. Corcoran raises it to ten thousand. He keeps raising the offer, eventually to fifty thousand dollars (!!!) - but Lenny says, “I didn’t come here to negotiate for your daughter - I came here to fight for her.” Mr. Corcoran responds: “Have you ever met a brick wall? Well, you are talking to a brick wall!”
The next scene is Lenny and Kelly getting married.
How the hell did this happen?
Are we to assume that Mr. Corcoran finally caved in to Lenny’s demands, even though it is not actually shown?
Are we to assume that Kelly’s mother, who clearly liked Lenny and fell for his con-artist shtick, convinced her husband to allow Lenny to marry Kelly?
WHY on God’s earth did Mr. Corcoran, after flatly refusing to allow the marriage, so quickly change his mind?
Does anyone who has read the book that this is based on have any further insight into this puzzling quandary?