The fat woman lets herself be fucked by her brother-in-law
It tries to make you do something when you really do something else. All she wants is to get attention. Something that it does very well but as with every human being, there will always be the doubt of whether things are being done well. Something that is confirmed after this guy appears and starts putting his hand on her. There she understands that basically all she had to do was appear willing. Then the fat woman lets her brother-in-law fuck her. But not before giving him a blowjob on his cock so that it stays firm and opening her legs so that he can penetrate her pussy and make her enjoy herself.