Marriage dilemma

i am a married man of 5 years and my wife is currently expecting twins which i know are 100% mine. i found out a year ago she was having a affair with our lodger and after moving out of the family home and soul searching we decided to try again. the lodger is still staying in the house. things progressed but the relationship hasnt really been smooth riding since then. We discovered she was pregnant at the 5 time of going through Ivf treatment and was expecting twins and it was the happiest moments of my life. but i had a nagging doubt there was something not right and after a bit of digging i found out she was still having a affair with this guy. i now feel like what should be the happiest time of our lifes is nothing but a car crash. she wants to work at things and be a family for the 2 childrens we are expecting and i dont want to lose my chance to be a father but cant trust or bare to be near my wife. i dont know what to do. will my feelings change in time or am i being taken for a ride.

You can not sort a relation ship out with three of you in it. The lodger has to go.........he should have gone along time ago. Sorry but that was a mistake not to remove him, no matter who he is. Once that person is gone you can try to work as a couple.... Give her two or three months to end that relationship out with the other guy. They may need to have a few conversations to end thier relationship, lm afraid younwill have to grin and bear it. Discuss with here a definte time frame. After that any contact is deceptive and unacceptable and I would be gone in a shot. You will need counciling as a couple, you obviously hold a lot of anger in yourself that will be destructive both to you and your relationship, and you need to try to get it out of your system. Things need to start now, get him out immediately, get booked in for counciling. You owe this to your children to try and work things out, but your children do not deserve to live in a totally disfunctional environment