<human>: Can you provide a brief rundown of the text in within 3 sentences?

I (28M) met my girlfriend (22F) in the fall, and it's been the most loving and passionate relationship I've ever been in. We inspire each other, and connect on every level. Two months in, she informed me of some of her baggage she has because she wants no secrets between us. She used to date a coworker, (46M) who is married with kids, for a year prior to me. She ended the relationship before we started dating, but they still work together all the time. He's still in love with her, wants to take her on trips, and pamper her. She has told me she feels nothing for him, but wants to maintain a professional relationship with him. 

Normally I am confident in relationships and dating, but he took her on two trips for work before she informed me of their relationship, and she told me nothing happened between them and it was purely business. I knew she was going on the trips, but obviously thought nothing of it, because I've never encountered someone that dated in that age gap.

Last week she slipped up with the help of alcohol, and indirectly let it out that he was more sexually experienced than I am. Which is obvious, he's older and has had more time, and is extremely wealthy to boot. I've never felt so insecure or inferior, and I've done my fair share of dating. 

I'm in love with this woman, but the fact she still works with this man and has a relationship at all with him is taxing on me. I've told her how I feel, but she doesn't want to quit her job, or stop their now "friendship" over it. Is there anything I can do to understand or cope with this bizarre situation?
<bot>: girlfriend used to recently date an older sugardaddy man, still sees him regularly and doesn't want to stop, but it makes me uncomfortable as can be. What can I do to cope?