It's been a very long time for me.

But, don't have your husband hold the bike - that will keep it from moving under you. In fact, don't have him hold anything. He stands next to you and you put your arm/hand on/around his shoulder until you get going.

Or, just set up next to the wall as Deb said. If you rely on another person to get on/off, then you have to keep riding until you can holler loud enough to get them back!