Husband Advice.!

So im a truck driver im gone one week and home 1 week but I dont trust my husband we have a 1 year old baby and my brothers wife usually took care of my son while I was gone (me and husband were separated at this time) but now were all getting our own place and if she kept babysitting my son for the week im gone and my brother is gone too (he is a truck driver aswell) so my husband would have to drop off and pick up our son from their house with her alone all the time for that week and since I dont trust my husband I dont like that (she is kinda flirtatious as well) but it’s convenient for us for her to help us I dont know what to do I told my brother about this and he says its up to me.

*Any Advice please I feel horrible about this.

*Im scared of what could happen (cheating between them)

*my husband has a past of cheating and lying to me were going to counseling for this