I have four kids and as per above, I am I die hard cosleeper.
The first two of my babies were twins, who I breastfed to beyond 2 years. We coslept in a king sized bed (DH elsewhere). Contact Malling, breastfeeding; minimal crying was my aim. We were sort of one-being for the first year or more.
Baby 3 and 4 were singleton babies, but being close felt right. If in strife, bundle everyone into bed, feed the baby and put a movie on for the older ones.
If this is what feels right, make it as safe as possible and crack on with it. Making it safe looked like a bedside cot on the side the baby slept for the first 4 months or so, then a bed guard and teaching baby how to slide off the bed on tummy if they wanted to get down. A floor bed is another option, though I didn’t do that.
It is all such a small window of time. It feels endless while you’re in it, but it also passes so quickly you can’t keep up with the changes. Just know that you’ll never ever regret an afternoon watching TV while your baby contact naps. You’ll never ever regret snoozing in bed in the afternoon with a sleepy newborn or a sweaty toddler. You’ll never regret circling a pre-schooler in your arms and falling asleep together only to stagger to your own bed at 1am when you wake. You’ll also cherish the times your 10 year old climbs in to your bed for a nighttime or morning cuddle.
It is all so exhausting at the time, and having moved to the loo and back during many a breastfeed I promise I get it, yet these moments of physical contact might be the ones that you remember so nostalgically forever 