After we clean your bottom let's get your pants on.
After I change your diaper we need to put your pants back on.
1) After we wipe your bum let's put your pants on.
「お尻を拭いたら、ズボンをはこうね。」
2) After we clean your bottom let's get your pants on.
「お尻をきれいにしたら、ズボンをはこうね。」
3) After I change your diaper we need to put your pants back on.
「オムツを替えたら、ズボンをまたはこうね。」
ご参考になれば幸いです!