HND-140, a sex partner who ejaculates once a month

She's neither a girlfriend nor a lover, just a casual sex partner I can have sex with when I want to! She comes to my house once a month, and we don't need any pointless small talk before she gives me oral sex and then I have sex with her without a condom! I'd like to date her, but as long as we can have sex, that's enough for me...