is this a form of cuckolding?

My story goes as, I was in a relationship for 3 yrs with a great beautiful sexy women who had a little bit of a reputation. We lived together for two out of the 3 yrs and slept in the same bed every night in the beginning. Towards the end of our relationship she started going out on girls night and occasionally relaxing out all night. Our sex had died down after the first year, i think we we're both to much on the submissive side to really enjoy it, although there where good times and love, but love like i was a provider. We would go out on occasion and she would flirt with me there, but there was one guy in particular she would flirt with in front of me and all our friends. It even got touchy one time in front of me and he would ask her for a take or a cigarette at the bar and she would ask me then give them to him. I knew i was submissive back then but didn't understand cuckolding at the time and don't think she did either. So after some time we had broken up due to a couple of reamisters, i was devastated and she moved in with the guy from the bar she would flirt with. We lost all communication and eventually found out she got pregnant( which she always wanted) and married with this guy. It's know been 2 and half years later and they have split up and are going for a divorce with her getting full custody. We are now talking again and seems like forming a new relationship with the baby involved and me to help take care of it. Not sure where the future will go with us but if this is a form of cuckolding maybe its good that we both understand it and maybe when the kid gets older she can start going out on girls night out again. Is this a form of cuckolding?