Is it ok 4 your g/f 2 have continuing relationships w/ X b/f 1 has a key 2 her house and she has a key 2 his ?

All of this happens when I am out of town ( sometimes I am gone 4 two wks 4 work ) or working late at nite. 1 X b/f will pay 4 all of her alcohlic drinks when they go out. 1 X b/f will pay 4 diner and a movie. 1 X b/f will come over and / or mow her lawn trim her bushes / shovel snow. 1 X b/f will take her out 4 dancing at a club and buy her drinks. 1X b/f buys her DVD players; sensual mage lotions. When I asked her how often she talks 2 these X b/f on her phone she replied about 2 hrs each or more a week.She also has multiple EMAIL acct. 6 of them, one 4 each X b/f and 1 for work ? ? She spends about 3 hrs a day EMAILING X b/f and other male "friends"somethimes w/ other females. While spending the nite, I was using her pc 2 check my work EMAIL about midnite; when a guy I.M. asking what she is wearing and if she is doing anything . I have explained 2 her that the last few g/f I had cheated on me; all of which were with their X b/f. Does she respect me ? Do I trust her ? HELP!