He will. Eventually, it will either stop bothering you or he'll stop doing it, sweetie. Try, in the mean time, not to let it get to you too much. At the end of the day, he comes home to you.
...promise not to tell anybody but...if it makes you feel better, unless Ethan is screaming or they're in the bath and I can see Sam's birthmark on his hip...I can't tell the difference between my kids. Who's the bad mother now? Beth is not going to hate you (although, according to Ben, she will be embarrassed of you, so that'll be fun for us to look forward to lol) and I'm sure you're doing fine. Every mother makes mistakes but what's important is that you're doing your best and you love her.
I'm okay with other people holding the boys, I'm just not okay with leaving them, yet, I guess... But yeah, cool I'll see you then :)