Do I say something to her?

I live with my partner and 2 kids, I came over to her house to visit after she finished work, had a cup of coffee and then sat in the living room with my baby in silence, baby was sleeping and I was just scrolling on my phone.

I hear mom on the phone to her new bf, they've been together for about a month. She hasn't got the best luck with men, her exs are complete dickheads and I always saw it, she never listened.

So this new man is like her dream, he comes from a wealthy family, his wealthy himself (we grew up poor, especially my mother), he has a nice car, nice house, good career, takes her out on amazingly romantic dates, surprises her with dresses to go on their dates with, complete gentleman. He has a couple older children and one 4 year old, claims his ex's are "crazy".

I can see how completely inlove they are, I can feel the intensity just by sitting with them.

Last night he stayed at my mom's with his 4 year old, this morning his kid threw up all over the place so he took his son to his mom's (his ex) while my mom was at work, then after work and seeing me, the plan was to go to his house, but when she got home, she realised sick is still everywhere, his sons clothes are still there on the floor, bed covered in sick, nothing was cleaned, tidied or washed, so she cancelled going to his because she only got home from work at 7pm and had alot of cleaning to do.

So the phone call - because my mom cancelled, all of a sudden his questioning their relationship, she explained 10 times that she's just tired and has alot of cleaning to do, then he questions her text messages, admitted his gone through her phone and "why did your manager want you to let him know when you're back?" he seemed pissed off, mom told him her manager meant that by let him know when she's back at the depot so he can log her hours and knows the van is back (she's a delivery driver, post and packages), again she had to explain that 5 times, then questioning why her ex bf sent her flowers 3 weeks ago (her ex was still trying to get her back, had no idea at this point of her new relationship and the flowers were sent via delivery), so many more things, the conversation seemed so exhausting to me, my mom just kept her calm and spoke to him all lovey dovey, then she offered him to come over here, he didn't want to and still wanted her to go to his, she did and asked me to stay another 2 hours to finish her washing 🙄

But she doesn't know I overheard the conversation, when she told me that she is infact going over, she made it sound like she just changed her mind, like everything is okay.

Idk man, I always had bad feeling about him ever since he randomly turned up at her house after work uninvited 4 days after first meeting, I think it was just to check up on her and the house, make sure no men are around AND they can't seem to spend one day/night apart.

Should I say something to her expressing my concerns bearing in mind she never listened to me before and brushed everything off?