Is it normal that I can only get a hard erection with my spouse

Yeah. My girl doesn't always make me hard. But I get hard for her mother cousins her friends even my best friends mother. Omg a few of her friends wanna fuck and I can tell and actually fucked 1. Well at at bar we were drinking and me and her friend kept starring at each other and eventually I whispered in her ear. I wanna fuck you so hard... She said Omg I want that so bad. Later my girl was with her friends me and her friend went in bad own stairs in the bar and started kissing and rubbing and fingering then she had my cock out jerking me then she sucked me then I ate her then she said now fuck me and bent her over and fucked her hard and she said after she came Omg I'm on the pill cum in my pussy and I then busted and cummed all in her so much. Another friend saw a picture of my cock on my girls phone... I was hard and so big and she kept starring and her boyfriend went for a drink I said I know you wanna see the real thing and said yeah so eventually showed her and she made it feel so good. Omg