My first serious adult girlfriend was a lesbian a few years older than myself. But there were valid reasons for this. Firstly we lived in an uber rural area and there was no way she could 'come out' in those days.
We were well matched in socio economic and intellectual terms .... plus importantly I am Asexual and have zero need for being tactile or requiring coitus. What I am is a BDSM Alpha and she was a BDSM submissive ... So we worked as a couple for very definite reasons at that time. It could never last and it was about 18 months before we both got caught up with other life, university etc etc.
What does any 25 yr old female see in any 55yr old married man? One has to assume you are not super rich nor socially/business/ people connected nor powerful in any way ..... So that is the only real reasons
out of the picture.
Do yourself a truly vast favour and get away from the human hand grenade which that young lady represents ..... Or you will most likely be spending your retirement divorced and eating cat food in a homeless shelter.