Abortion

My wife missed her period cycle yesterday and when she did the pregnancy test, result is found to be positive. At the moment me and my wife are not planning for a baby. The reason is we have two daughters, elder 4 years while younger is 14 months. The younger is quite small and we are still in the process of adjusting her. Secondly the last two pregnancies of my wife were went very tough and she came to complete bed rest for at least 7 months of the whole pregnancy period. This creates issues in between us and reached to hard talks. And effects our relation and commitment with the kids as well. I travel a lot approximately 280 days a year due to my job requirement within and outside the country. This adds to our problems as well. This also gives us a less time to spend together and give proper attention to kids. Can we discontinue this pregnancy because of the abovementioned reasons. I seek guidance from you.