In some ways it's tricky, in other ways it isn't at all.
If his ex-wife is disrespectful towards you, you should avoid confrontations and do what is in the best interest of the children. Getting in verbal arguments with his ex will spell disaster for the situation. Meanwhile, controlling yourself while she appears out of control will show your man how much you care about him and his children. 8 Great Dating Tips For Recently Divorced Women
For more essential tips on how to successfully date any guy, read The 7 Self-Sabotaging Behaviors That Keep Women From Finding Mr. Right.