Prefers One Parent over Another

Question:

My almost 2-year-old son used to take a bath with my husband everyday after dinner. That used to be “their time”, and he was always happy to go with him. But a few days ago he started to refuse to go in the bathtub. As soon as I get in the bathroom he agrees to go inside and take a bath. It has been like this for the last week. He just cries like crazy until I come in. I really have no idea how to handle this situation. I am not sure I am doing the right thing getting in the bathroom and bathing him, I feel like he is manipulating me, and my husband is just heartbroken because that was the only thing they do together everyday. Any advice???

Thank you soooooo much!