Manipulation results from insecurity. In the past I wanted my way and/or felt my way was the best but was too afraid to be straightforward. So I created a situation for success.. sorta.
Now I've learned it's better to put the cards on the table and move on. What if you asked your spouse about your daughter wanting a big girl bed and see what comes of it? Being given a choice is better than being shoe horned into a decision.
This difficult time is also an opportunity for self evaluation. This painful emotional upheaval is a great time to purge and relieve yourself of fears and hurtful habits. Face fears head on and learn to let them go.
Start by being honest. If he offers to bring something over and you don't need anything, tell him you appreciate his thoughtfulness. Simple short sentences.