Long story short he is in charge of DS when I travel for work...DS is ft at nursery but he has to drop our DS off and pick up, feed dinner, 7:30 bedtime...generally 1 night per week. Agreed condition is he drinks no alcohol as he doesn't know when to stop. Just got back after 2 nights away & he is asleep on the sofa DS is fine, I know he was awake 30mins before I got home but suspected he had been drinking then...there is an open beer can by his side, no further evidence but he hasn't even woken up and I've been back 1hr...what the fuck do I do? My DS welfare is obviously priority. Do I give him an ultimatum, kick him out? DS is 18 months old 