Wife gets fucked by friend

W8fe of a friend of ours left him and my good wife (45) was a shoulder for him to cry on. He' come round for tea and sympathy. So one fay sitting on the leather couch after the tea and a friendly hug he got a closer and laid her back on the couch and lifted her green summer dress revealing her white cotton knickers. He undid he jeans pulled them off dropped his boxers . She could see his big veiny cock bolt upright. Only the second couch she'd seen after mine. She doesn't know what to do. He pulls her knickers off exposing her red thick bush .he pushes her legs apart and tries to get in her but he's too big and si he tells her to hold her legs up. Then he's in pumping like he hasn't had it weeks. Which to be fair he probably hasn't. She tells him not to cum but he's not hearing her. She looks over his shoulder across the room. He doesn't even kiss her. Suddenly she feels him tense and tries to tell him again not to cum but she feels his hot spunk shoot right up her. He doesn't even say thanks gets off and gets dressed. He looks back at her tears in her eyes. He looks at her swollen cum filled pussy and smiles. He needed that. He leaves as she is still putting her knickers back on.
He comes back for more for weeks after. He even persuades her to go for walks with him in a wood he owns. And he has her on the ground against a tree. even fucks her on the floor of his kitchen. Why does she let him. Does she just feel sorry for him or what? I have never been bad to her and she let's him treat her like fuckdoll. Eventually I got suspicious of it and she went round his place to tell him they couldn't see each other anymore. This is what I think happened. She told me nothing happened. But ???