As in not telling the truth to yor DP??
I haven't nor ever needed to lie to DP but found out today he has lyed to me. Nothing major...just confused as to why he had to.
Bascially, he is meant to be going out on a family birthday thing this weekend. Sometimes it can be just DP family and no partners, sometimes partners and sometimes it will be family and friends.
DP brother phoned him 2 weeks ago to mention the get together and at the time DP didn't know who was invitied. I asked him to text/phone his brother on Sunday to find out whether is was a Friday/Saturday night and who was invited.
We don't really see DP family much because of his relationship with his mother, and i have always had the feeling that i am blamed for this and just curious if i have been invited.
Anyways.... Sunday evening Dp told me he had text brother asking for arrangements.
His brother had still not replied 
by this morning and Dp had phoned him and got no reply. Which i thought strange.
He then admitted to have not text/phoned his brother and dosen't seem to know why i need to know what day he is going out and why i should want to know if i am invitied or not as i probably wouldn't want to go (true, i have no energy for socialising at the moment). We have lots of children and lots of pick ups/drop offs to do every weekend, and so would like to know that i am organised without DP's help come the day he is out.
Not sure how to feel about this, i know it's nothing massive but i am a bit wobbly since he left for work.
Everyday i had asked if he had heard frm his brother and he said no, why lie?