If she still has his stuff

We have been living together over a year. We recently had a baby. The baby is less then a month old. All I do is work and come home. I have 2 jobs and just got another one. Also I have a interview for a 4th job. She's off work so I gave her money every time I get paid and also pay the bills so she won't stress. But I come home when day after a family bbq and she says I was out cheating. Next she throws all and breaks all my things. I have another son who isn't by her and she threw his things. She also said she'll fuck her ex to make me mad. Come to find out she's hiding his ball caps in her closet. In the condo we obtain and love in together. Am I wrong for getting mad? Does it seem like it's foul play going on?

Wow!! I am sorry for that is a major red flag

No, you not wrong for getting mad but you need to step back and have a look at what you're trying to achieve by working at 3 different jobs and contributing to the life with your partner and baby. While you are on one level, she obviously is on another and her disrespect for your efforts, her accusations of you cheating and her reaction to it should tell you in more ways than one where you stand with her. If she had any maturity, she would have at least given you the opportunity to discuss it. On one hand, your partner's actions and threats are a reaction, but on the other, her actions of keeping AND hiding from you, her ex's property means that she owes you an explanation. You guys can only sort the issue by using communication and talking it out.