Husbands transgender friend

Not related to pregnancy. My son turned one this November. Me and my husband didn't had sex from the day I know i was pregnant. After delivery I thought my husband is staying away for me to recover from c section. But it's almost one year post delivery but he is still away. I recently came to know that his friend is a transgender, he was straight before. So my worry is if he is changing my husband also as my husband is always on chst or calls with him and they meet almost every day. Need help badly, I don't want my husband to change,I love him so much.