Obsessed with my MIL

Back when I was dating older women I added this lady bc I thought she was cute asf. I’d message her stuff and she’d react, she’d love or like all of my FB posts. One day I seen her post her daughter, and how she offers skin care and for possible clients to hit her up. I sent her daughter a message and now where married. But I still find her mom to be so beautiful, and gorgeous still. She had a fat booty, pretty face, and is funny as hell. The first time I met my MIL in person was when my wife brought me to her work. She had on some jeans that were so tight the buttons on her pockets were about to shoot off. So I’m sitting on a chair in the lobby, all of a sudden my MIL stands directly in front of me with her ass facing me, she starts to rock back and forth on her feet, I’ve always felt like she was showing it off on purpose but I can’t be sure. Anyways, now when I see her I get so horny and turned on, she stays over at my house sometimes, she walks around in her PJ pants with no panties on, I end up day dreaming. I’ve seen her underwear several times and wanted to say something but it’s not worth it. I want to fuck her so badly, kiss her pretty lips, and touch her ass. Sometimes I feel like a prisoner in my own head because she drives me off the wall whenever I see her. She caught me staring and just smiles when I do. Nothing will ever happen I’m sure, but do you think she’s creeped out when I look at her ass? Or do you think she likes it? Either way I’m obsessed with her and not sure if thats normal