Had a few like this over the years. Hong was like that with me for a while. Mostly it's been with older mamasan types. Lucy in Mt Lawley years ago and LiAnny who used to run Jade on Lake St both were in relationships but just horny older Chinese women. They weren't husband shopping.They never charged me any extra for extras. I tried to offer but not interested. Was great while it lasted but then they both went into semi-retirement.
My most recent long term private arrangements both started that way. Sadly, both of them gone separate ways. Was awesome while it lasted. Enjoy it while it lasts