What are the signs to look for, if you suspect someone you know might be a lesbian?

My friend just got a divorce, he said to me his x-wife was married before but, she said it was time to leave. So she left and got the divorce. Growing up she did not date much. After her first divorce, she might of had one date in seven years. She married again, and after three years was ready to move on, but, did not divorce until two years later, but, she had it all planned out, so by the time she did divorce she had her own checking account, car in her name, etc.... My friend thought, deep down that, because of some signs, thought she might be a lesbian. He later found out that she had to go on medication for depression, and anxiety. By the way, she cannot handle rejection, only if she's the one doing the rejecting. Lastly, she had problems hugging her daughter's. My friend told me that she did not love him like he loved her. She's very complex, and secretive, and extremely touchy. My friend was confused most of the time. She also had problems touching my friend.