@VicPark, I always have the TV on and DD has my iPad every time I'm feeding or rocking DS to sleep but as soon as I leave the room to put him down or finish settling him in his/my room she runs after me - no amount of distraction stops her. So I tried to settle him completely in his room with the door closed and she's banging at the door screaming. When I left the door open she came in and stated talking loudly and playing with things in the room - all of this while I've left her with the TV, iPad and food.
@BigRedV I was hoping DS would be one of those babies just like your kids
Last night he finally went to sleep about 9:45 and didn't wake until 4:30, so I don't think it's the 4 month sleep regression yet as surely he wouldn't have had that big stretch of sleep if it was??