Yet another opinion but, bear in mind please, it is an opinion. My wife (Sub) approached me with the idea initially as well. I was pretty much a Vanilla kind of guy [up to that point]. All the "We don't hit women", and "You want me to do what to you?" was a shock to my mind at first. Well Sexyxslave 69, after watching some porn with her in control of the mouse, OKAY a lot of porn with her in control of the mouse, followed by some open discussion over Adult Beverages of what we watched, I began to see into her mind. We did some new stuff based on the videos and our conversations. I honestly don't know who really enjoyed it more. We both read stories privately and to each other. We have gone to the local sex shop, made purchases as a couple and even asked staff persons open questions about some of the toys available. There is no limits to our discussion topics and secret desires and "Have you ever thought abouts" during our talks. I realize that she has a certain need. To even approach me with the subject took courage on her part. "What if he thinks I am some kind of freak or perverted person?" Trust in me was her bedrock. Hope that I would be willing to "Hit her" and "Put it there" allowed her to open up to me on the deepest, innermost level sexually. I proudly accepted the RESPONSIBILITY to be her Dom. Your Dom / Husband can gain a lot of insight and reap enormous benefit by giving a real chance to meeting your needs and desires within this lifestyle. As for Mom and the little one; Plan times for her to take the little one to the movies, park, zoo, shopping. If planned windows are presented there will be no reason why you can't play in your own home as free and loud as you want. Go to lunch or dinner as a couple but go to a motel instead. There is a ton of things you can do but communicate your want for this to him in a manner he can only say yes to. He loves you and wants to fulfill your life. Don't let him wiggle off the hook so easy.
Just an opinion.