Relationships

Guys, I think my boyfriend is sleeping with my sister again. I am going crazy or what?

My boyfriend and my sister slept together before And my sister had no shame in it. My boyfriend and I have three kids together And at the time we wasn't together. My sister said we wasn't together and she didn't care. Im trying my best to trust them. My boyfriend goes over there to my sister, to pick up our daughter To take her to school Because my sister refused to do so even though my daughter lives with her and its 2 mins away from my daughter school. Which I understanding its our Responsibility as parents. The thing is My sister's vehicle stopped working because of her brakes. So my vehicle is over there at her place. She refuse to jump the battery and she wanted My boyfriend To jump my vehicle. My sister had jumper cables in her car But she told me she had to go to our mom's place to get them. So my boyfriend had to take her there and she laughed about it. My sister hasn't been in a Relationship In a while And I know how she is when it comes to sex.

Plus my boyfriend Hardly have sex with me anymore. And when I told that to my sister, she smiled really big n I looked at her. She Shrugged her shoulders saying I don't know and looked away.
Guys, I think my boyfriend is sleeping with my sister again. I am going crazy or what?
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