Unexpected ending for kink

The wife and hubby were up to something special. They were getting it on and then the wife cuffed him to the bed! Everything was just fine, and then bzzzz, doorbell. Her mother came, sniffed the air filled with fucking, and had a plan straight away. Watch her send the daughter away on some errand and grab her opportunity. The husband was not even trying to protest. She used his meaty cock in every way she wanted and had his cum all over her crotch. Then the wife came and got so damn pissed!