I did not know where his Wife's family was, but knew he spends his summers in Haliburton, where he was born and raised, and assume that's where his family, also a support network, is still located.
Don't know about you, but I'd prefer living in Haliburton over Denver, in the off season, and suspect that will only be a minor factor in his decision on whether he remains a Senator or not.
The Duchene's can continue living in Haliburton, in the offseasons, just as they have his entire career, to spend time with his side of the family.
During the hockey season, however, a time when Matt Duchene is on the road for ~100 days, it's easy to believe that Ashley Duchene would like to be closer to her family, as she doesn't get to see them in the summers, especially when she's raising children. Denver to Ottawa is a minimum 6.5 hour connecting flight.
That's often how a lot hockey marriages work. The family spends their summers where the father (player) grew up, and the seasons where the mom and wife grew up. It's one of the biggest reasons why players re-sign with the team that drafted them, if they can, because they often meet their spouse when they're 18-24 years old. It's why players like Andreas Dackell, Radek Bonk, and other former Senators still live in Ottawa, despite not being from here. Their partners are.
It's also why rumors out of Karlsson's group of friends in Ottawa have him signing with the NYR and not SJ, so that Melinda can jump on a 45 minute flight to get back to Ottawa whenever she needs/wants.