AITAH for thinking something is going on between him and his friend ?

So the reason I think it’s sus is the backstory is he has a kid with his ex they just ended things a month ago. So his kid is 1 but the weird part about this is he then told me he was at the mall. He didn’t text me the whole time he was there which was weird because he would text a lot he claimed that he couldn’t text because he was helping his friend carry things. He also kept referring to his friend as they and then I asked if it was a guy or a girl he said it was a girl and that she was carrying her baby around the mall and he was holding her bags. So three hours straight no reply then he took her somewhere else on a different day and then went to her house and she was braiding his hair mind you, he says this girl is on maternity leave and she just had a baby a month ago. So I don’t see just any friend staying up all night with a new baby to braid her friend’s hair. I just thought it was weird and he also went to her house with alcohol and couldn’t go home that night due to him being tipsy after she finished his hair .