If you need to put "girl" in between quotes, then she is not "your" girl.
You owe her nothing. End that relationship and look for other options, or keep enjoying the sex and look for other options.
Plus, she is having sex with another man while having an affair with you. That should be enough for you not to ever consider her seriously.
You owe her nothing. End that relationship and look for other options, or keep enjoying the sex and look for other options.
Plus, she is having sex with another man while having an affair with you. That should be enough for you not to ever consider her seriously.