Husband secretly fucks sister-in-law

The brother came to his brother's house to visit, although he was over 30 years old, but he had not yet married his wife, with his eager nature, he sneaked into his sister-in-law's bathroom to force her to satisfy him. It's incomprehensible that my sister-in-law didn't scream at all and accepted the buscu for him, it seems that her husband and wife's relationship is not as they wanted