If your blonde girlfriends mom is riding his cock, you're not alone. This is happening more these days. It's common for women to try to cheat on their husbands and this tactic is certainly not uncommon. Here's how to make your partner think twice about cheating. You can start by getting a piece of advice from your mother: don't take this tactic personally. After all, you're a woman and he's a man, so you don't want to look like a sex slave, right?.