Just wanting some suggestions/advice from other cosleeping parents. Our situation at the moment is that my ds2 sleeps in the bed with us, next to me, with a bed guard stopping him rolling out that side. He has a good bedtime routine, we all eat together about 5/5.30, he has a bath then a wee play then stories and then bed about 7 where he breastfeeds to sleep. I (or sometimes my husband) then sit through in the bedroom with him in the dark for the rest of the evening 
It would be nice to leave him through there and have some evening time together, watch some telly maybe even have sex but we are worried he might wake up and fall out of bed/ roll out the other side. Is that daft? We are hoping to move him to his own bed once he's two but at the moment we don't have the space for a bed for him so he needs to be in with us really and I also love having him in with us tbh. We can't take the mattress off the bed frame and put it on the floor because my husband has health issues which mean he couldn't get up and down from a lower bed very easily.
What did other people do? Would he be safe enough with a monitor on? Our house is pretty small and all on one level so it wouldn't take us long to get to him. Am I being totally precious about this?
Any suggestions gratefully accepted 