Need mommy advice.

Hi ladies,

So this is my issue. I'm currently unemployed at the moment. A few days a week I babysit a 7 month old. I figured it's a good deal because I get to bring my 11 month old son with me. My son loves the other baby, always gives him hugs and wants to play with him. The other baby doesn't seem to like it when my son is around. Always crying and screaming. When my son isn't with me, the 7 month old is happy.

How would you tackle this issue? I need the money, but I feel bad, I don't want the baby to be upset, but I also love having my son around. I feel bad because I always have my sister pick up my son so that the problem is resolved.

Thanks in advance!