Help my 19 yr old is dating a 30 yr old girl!

Mattsmom97

So my son was a virgin until 3 weeks ago. This girl who took his virginity is 30 plus she was screwing his 19 yr old friend 1 week before him. She has 2 children a 4 yr old boy who could use counseling and a 1 yr old little girl. He recent x is 36 and from speaking to his family hes not playing with a full deck. When my son first introduced me 1st thing i asked was how old r u? She didnt want to say. Now i already told this girl i look everyone up. She then told me 26...later that night going thru ** i found her page 21 friends and seems no real family support. Went on her x's page found hia aunt who told me they've been on and off for 15yrs...yea didnt add up so i looked her up on google and found out ahe had been arrested in 2015 and saw her dob as 4/86...my heart dropped and i was angry on a whole new level. The next day i went to pick my son up from his friends house as i found out shes staying there so i confronted her. Yep i yelled called her all kinds of names. My son was trying to defend her and when she went to say anything to me i told her ro save it as shes a lier and i wouldn't believe anything she said. So now my sons in love yeah 3 weeks and in love playing daddy to her kids taking the bus to the meet up with her and yeah she doesn't have a vehicle but put both kids on a bus to travel 15 miles to meet him at the mall.smh what does a 30yr old want with a 19yr old fresh out of school with no job?? Her tubes r supposedly tied which is a good thing but i still get on him about stds...her little girls father was also 18 and she cheated on her x when that happened but the guy knows and claims the baby and signed the birth certificate. It seems like an episode of Jerry Springer but sadly its not its really happening. Im not condoning this relationship but trying not to push my son away either. Just at a loss here. She doesn't put her kids first and she acts like a teenager texting and chatting all day with him. He wants and trys to see her every day. Im not making it easy on him if he wants this hes going to have to figure out things himself. Then again i cant leave him out to dry also. Just lost and confused. Will she ever go away? Shes very manipulative i c it in her actions with him saying what he wants to hear and playing the victim. My kid has a big heart but extremely naive with this. TIA