Is my friend in denial?

My best friend and I know each other for 12 years, so she is specting her second child, but once and a while she likes to have sex with me. She likes it enjoy it, but when we leave the hotel acts like she is mad, but she even tells me that she likes it. She let me kiss her anytime and grab her boobs and butt. So I don't know what to think. She knows I am bisexual. I am a woman by the way. Help please