Hey sorry for the late response, was busy with work!
Jealousy is a normal thing and while my gf and I are sexually daring, ultimately it's just a small section of our love lives. We're predominately monogamous and came from strict religious (me Christian, her Indian) households so there are moments where that really impedes.
That said, her getting fucked by another guy was hot in the moment but there was a good deal of shame I felt after. Likewise even though she's comfortable with me getting pounded or sucking cock, sometimes I'll feel ashamed of it after. You just have to remind yourself that your partner is with you for a reason. It's cliche but communication is the most important thing bar none- if you're open and not ashamed of your sexual tastes then your partner will be more open to respecting them. Hesitation and uncertainty aren't sexy to anyone so just own it.
That said, specific instances of jealousy? Well let's take her getting fucked by another guy again; after the adrenaline wore off, she could tell it was bothering me and I just had to come clean and say I didn't like it. She was understanding and so we spent a good month or so trying out deeply personal fetishes we had and had lots of meaningful sex reminding ourselves why we were attracted to each other in the first place. In addition I feared that she would find something better and ditch me so we took time to really become more affectionate. Find out WHY you're jealous and quell that insecurity by really bonding. She doesn't get jealous when I'm with guys and I don't when she's with girls because I don't have a pussy and she doesn't have a dick lol.
TL;DR- communication and a willingness to improve by being completely open.
I like talking about sex & relationships so if there's any particular stories or things you wanna know just let me know :3