i hope these answers will help u in your relationship towards ur husband/wife.
1. check if her/his feet are pointing towards u. If they are he/she still has interests in u, If they are facing away he/she has no interests in u he/she is seeing other people, if they are in the middle that means he/she likes u but he/she is still seeing other people!
2. Does he tell u he/she loves u? Often: he/she loves u, never: he's/she's cheating, and always: means he/she would never trade u for anything he/she loves u!
3. If u ask him/her if he/she loves u make sure he/she is looking into your eyes if he/she is looking at your eyebrows he's/she's lieing.
4. if he/she is gone more than 8 hours a day then he/she is with another women/man, If he/she is home for more then 5 hours he/she loves u, If he/she is home all the time and u are the only one that has a job then chances are when u are at work there's another women at your house: so everytime u go to bed why he/she is in the bathroom or somewhere else check the bed with a black light or check somewhere, were u think he/she would have sex with another women if u find eveidence tell him/her face to face and tell him/her it's over or work it out!
I hope u can find out if he/she is cheating on u with this advice!! Good luck.....