New couple from Central Europe exploring cuckold fantasies

Hello everyone,
we are Honza (34) and Vendulka (33), a married couple from Central Europe (Czech Republic). We have been together since we were 16 – that's 17 wonderful years full of love and deep connection. We got married and our relationship is still incredibly strong, passionate and harmonious.
Last year I (Honza) opened up to Vendulka about my fantasy that has been with me for a long time: I get extremely aroused by the thought of her having sex with other men while I watch or know about it. The idea of her experiencing intense pleasure that I alone can't give her drives me wild in the best possible way.
What turns me on the most:
A well-endowed black bull who could give her deep, powerful orgasms and show her sensations she has never felt before.
But also a much older, very experienced man (60+) – his confidence, skill and natural dominance really excite me.
Vendulka is naturally dominant in our bedroom – she loves taking control, teasing me and having me worship her. My fantasy has intrigued her and we are slowly exploring it together – for now mainly through talking and sharing ideas.
Honza & Vendulka