How do i have sex with a toddler in the same room?

My question is worded weird and i will not be having sex in the same room, if it comes off that way BTW. To make that clear.

Im going to be moving in with my boyfriend. My son will have his own bed, and me in my boyfriend will be in the bed. Custody will be split between his father so ill have my son half the week. But when or where could we have sex? He has his mom staying in the spare room temporarily because shes sick, so she comes in and out, and we cant really just do it on the couch, and the spare room is taken 😩. With his dad, when he was a few months old, we would go off into the big walk in closet inside of the bathroom when he was sleeping. But i cant do that here. Any suggestions? Or will it just not be possible