Mine didn’t tell me he had such a small baby until he was sure I liked him. Baby was like a few months old.
He also turned up hungover on the first date, stank of booze and then nearly fell asleep
He also had a sob story that his DW cheated on him. His mother was cold and horrible and his sister was also a mess.
I still gave him a chance didn’t I 
He seemed really like a guy who was a bit of a muddle (I called him Mr Muddle) but was a good guy deep down
In reality he also had a ONS years ago and had a child he barely saw (and didn’t see till child was 3). He had the 2 other small DC with his ex and she ended their marriage due to the fact that he was extremely lazy and selfish. She then had a ONS with a colleague which he found out about so it got turned round to ‘cheating’. Apparently he had no idea he was so lazy but she spent years with him until she had enough of him doing virtually nothing but all the things he felt like doing so she kicked him out. He then was able to become the victim of her behaviour
Which I got to see first hand his laziness. He was constantly asleep, about to go to sleep, thinking about sleeping, going to the pub, staring at trash TV, constantly on his phone all day and night, gambling online, god knows what else. He drank fizzy drinks and ate junk food all day and night. I once got really cross because he would not stop eating chewy sweets in bed at like 2am and keeping me awake. He was like a 6ft 3 teenage boy (no offence to teenage boys). He was impossible to make plans with and would lie to me about loads of things. We didn’t drink much together but one time we went on a night out he was staring at a girl on his Facebook for about 10 mins while I stood next to him. When I pointed it out he got all angry with me. He also got constant texts day and night and if I made a comment about it being rude, he would get very defensive even once shoving the phone in my face. He had a very attractive female friend who he spent a lot of time with, he let me meet her once and I got a weird vibe from her. She was always making him dinners
. He would stay up all night online then sleep all day. He also started talking about his ex constantly, dropping her in every conversation. He then would just ignore me for days on end.
I just had enough of him and broke up with him. we stayed in touch for a while but he just became rude and obnoxious to me, told me I was irritating, annoying, asked too many questions, was a nag etc. Then he would become all needy and insecure. I’ve blocked him now and cannot believe what I put up with!