1 drunk night and i thought he lied to me

So my bf weve been together for about 6 years now , he had sex with his ex so i thought he did it on purpose . We was fighting he went out with his bestfriend they ran into his ex the one he was with before me . Got drunk ( he is not a drinker just by drinking 2 beers or whatever gets drunk) . She took advantage of the situation ( most will say HOW DO YOU EVEN KNOW?) .she recorded herself well her bestfriend recorded everything he was just laying there , and you can hear him at times in the video saying oh haze he thinks its me . We took her to court she admitted that yes he was drunk and and PREGNANT! It's his baby is now 8 months we have custody of the baby i also adopted him , she gave up her parental rights because her new man didn't want kids . We moved to where he is stationed now here in Alaska its been such a big adjustment moving and not just that having a baby . I can honestly say i love this little chunks makes my days better . We also closed our socialmedias her family wanted to keep coming at us . It's been crazy............................................. for some can understand her parents never liked my bf when they was together she had a drinking problem in highschool and they thought he was the influence to her drinking , and her bad behavior when he decided to join the army its when they broke up she went to her parent's saying she was pregnant and that he was leaving her SHE WASN'T PREGNANT ! that made them hate him more . Before we decided to have full custody of the baby we spoke to her parent's they flat out said they wouldn't co parent with him that they wanted full custody and never to see him again . We had all that recorded we took it to court and we won once she gave up her rights , the process for me adopting him started. Her parent's just cant see that she chose to be someones women before beinga mom.