I have bub on back with head turned then offer fullest boob. Top one he reaches by me rolling further over, sort of squashing the bottom boob. My arm is always above his head.

I got a blocked duct in the squashed boob from falling asleep while feeding from the top boob, so watch that.

Ahhh...I miss the days of looooong feed sessions on the bed. Poor ds has to take it when he can...but he feeds all night to make up for it...and I love that I can give that to him.