You should spend more time for your kid, buy for them presents,toys, play with them,...then they will getting closer to you
Ask your wife to tell your kids to ask you sometimes instead of her. Or if your kids need help try to offer yourself
When u r with them, try to be involved in things they do. Play with them
spend time with all of the family together. Like go to the park.
Talk to her about your side..
No problem