Bathing a toddler and infant

I have a 21 month and 2 month old. I bathe them around every other day. It's hard to bathe both of them in the same day. I think I'm gonna bathe them on different days. I feel bad asking my husband to bathe the toddler because he gets home and he's tired. How do you do it? Do you bathe both kids the same day or different days? (I'm talking about with a baby who is unable to sit and hold is head up... or else I'd bathe them in the tub at the same time.) I'll respond to any questions here, not as a comment because this is anonymous.