如果继女不在家，而她的男朋友来了，那么继母就占了便宜

The girl had called her boyfriend at home, when the boyfriend reached home, the girl had gone out for some work for a while, but her stepmother was at home, as soon as the stepmother saw her daughter's boyfriend, she took him inside the house and did everything with the stepdaughter's boyfriend before the stepdaughter arrived.